Welcome to our Pool Equipment Glossary! This comprehensive guide has been carefully curated to provide pool owners with a better understanding of the terminology and terms associated with the equipment used to run and maintain their pools. Whether you’re a new pool owner or a seasoned enthusiast, having a solid grasp of pool equipment terminology is essential for effective pool maintenance, troubleshooting, and communication with pool professionals.

The purpose of this glossary is to demystify the pool equipment jargon and provide concise and accurate definitions for a wide range of terms related to pool equipment and repairs. We understand that navigating the world of pool equipment can be overwhelming, especially with the myriad of technical terms and acronyms. By compiling this glossary, we aim to empower pool owners with knowledge, enabling them to make informed decisions about their pool equipment, diagnose common issues, and communicate effectively with pool technicians or contractors.

Whether you’re looking to upgrade your pool equipment, troubleshoot a problem, or simply enhance your understanding of pool maintenance, this glossary serves as a valuable resource. From pumps and filters to heaters and automation systems, you’ll find explanations for various components, accessories, and repair terms. By familiarizing yourself with these terms, you’ll be equipped to take better care of your pool, optimize its performance, and ensure a safe and enjoyable swimming experience for you and your family. Let’s dive in and explore the pool equipment world together!

Pool Equipment Glossary

Pool Equipment Glossary – Find out what different pool terms mean.

Pool Equipment Glossary


  • Acid Wash: Acid wash is a pool maintenance procedure that involves using a diluted acid solution, typically muriatic acid, to remove stains, scale, and mineral deposits from the pool’s surfaces. It is particularly useful for restoring the appearance of a pool with stubborn stains or discoloration. However, acid washing should be performed with caution and under proper safety measures to avoid damage to the pool surface and harm to the handler.
  • Automatic Pool Cleaner: An automated device that independently cleans the pool using suction, pressure, or robotic technology. It removes debris from the pool’s surfaces and water, reducing the need for manual cleaning.
  • Air Relief Valve: A valve designed to release trapped air or gases from the pool’s filtration system. It helps maintain proper water flow, prevent airlocks, and optimize filtration performance.
  • Algaecide: A chemical compound used to prevent and treat algae growth in the pool. Algaecides work by disrupting algae’s cellular structure or inhibiting their ability to photosynthesize, keeping the pool water clear and algae-free.
  • Alkalinity: Alkalinity refers to the measure of the water’s ability to resist changes in pH. It is an important water balance parameter in pool maintenance. Alkalinity acts as a buffer, helping to stabilize the pH level and prevent rapid fluctuations. Maintaining proper alkalinity levels in the recommended range helps to optimize the effectiveness of sanitizers, prevent corrosion of pool surfaces and equipment, and ensure comfortable swimming conditions.


  • Backflow Preventer: A device installed in the pool’s plumbing system to prevent the reverse flow of water. It ensures that water flows in one direction, preventing contamination of the potable water supply.
  • Backwash Hose: A flexible hose used during the backwashing process to direct the flow of water carrying debris and contaminants away from the pool filter. It allows for easy and controlled disposal of the backwash water.
  • Ball Valve: A type of valve with a hollow, perforated ball inside that controls water flow by rotating the ball. When the hole aligns with the valve body, water flows, and when it is perpendicular, water flow stops. Ball valves provide reliable shut-off and control.
  • Bonding: Bonding refers to the process of connecting and electrically grounding various metal components of the pool system to ensure electrical safety. It involves creating a low-resistance path for electrical currents, helping to prevent electrical shocks or damage to pool equipment. Bonding typically involves bonding the pool shell, ladder, handrails, and other metal components to a bonding grid or copper bonding wire.
  • Booster Pump: A booster pump is an additional pump installed in the pool’s plumbing system to increase water pressure and enhance the performance of certain pool equipment. It is commonly used in conjunction with pressure-side automatic pool cleaners, such as Polaris or Letro, to provide the necessary water flow and pressure for effective cleaning. Booster pumps are typically dedicated pumps solely for the purpose of powering specific pool accessories.


  • Cartridge Filter: A type of pool filter that uses a replaceable cartridge element to trap debris and contaminants from the water. The cartridge consists of pleated fabric or other porous material that captures particles of varying sizes.
  • Check Valve: A one-way valve that allows water flow in one direction and prevents backflow. It ensures that water moves efficiently through the plumbing system, preventing water from flowing backward and causing damage to the equipment.
  • Chlorinator: A device used to introduce chlorine or other sanitizing agents into the pool water. It helps maintain proper disinfection levels and prevents the growth of algae and bacteria. Chlorinators can be inline, floating, or built-in systems.
  • Chemical Feeder: A chemical feeder, also known as a chemical dispenser, is a device used to introduce pool chemicals, such as chlorine or sanitizer, into the water. Chemical feeders are designed to hold a specific amount of chemical and slowly release it into the pool, ensuring a continuous and controlled distribution. They come in various forms, including floating dispensers, in-line feeders, or tablet erosion feeders, providing convenience and efficiency in maintaining proper chemical levels.
  • Control Panel: A control panel is a central device or interface that allows pool owners or operators to monitor and control various pool equipment and settings. It typically includes buttons, switches, and digital displays for adjusting parameters such as temperature, lighting, pump speed, and other automated features. Control panels are commonly used with pool automation systems to provide convenient and intuitive control over the pool’s operation.


  • D.E. Filter: Diatomaceous Earth (D.E.) filters use a fine powder made from fossilized diatoms to trap small particles. The filter’s grids or elements coated with D.E. powder act as a highly effective filtration medium, capturing debris as water passes through.
  • Deck Jets: Deck jets are decorative water features installed in the pool deck or surrounding area, shooting arcs or streams of water into the pool. They enhance the aesthetics of the pool area and create a visually appealing display. Deck jets can be adjusted for height, angle, and flow, adding a touch of elegance and sophistication to the pool design.
  • Drain Cover: A protective cover installed over the pool’s drain to prevent entrapment or injury. It helps maintain the water circulation while ensuring the safety of swimmers by minimizing the risk of hair or body entanglement.
  • Drain Plug: A drain plug is a removable plug or stopper used to seal the drain or drain port of pool equipment. It is commonly found on pumps, filters, and other pool components. Drain plugs allow for easy draining and servicing of equipment, as well as preventing water leakage when properly sealed.
  • Digital Control Panel: An electronic control panel that allows users to manage and monitor various pool equipment and settings. It provides a user-friendly interface to adjust water temperature, control lighting, activate spa features, and more, enhancing convenience and control.
  • Dual-Speed Pump: A dual-speed pump is a type of pool pump that offers two speed settings, typically high speed and low speed. The high-speed setting is used for tasks that require increased water flow, such as vacuuming or running pool features, while the low-speed setting is suitable for regular filtration and circulation. Dual-speed pumps provide energy-saving benefits by allowing pool owners to operate the pump at a lower speed when high flow rates are unnecessary.


  • Expansion Joint: A flexible joint or gap between different parts of the pool, allowing for expansion and contraction. It helps prevent damage caused by temperature changes and ground movement, ensuring the structural integrity of the pool.
  • Electrical Timer: A device used to control the timing and operation of pool equipment. It allows users to schedule the activation and deactivation of pumps, heaters, lights, and other electrical components, promoting energy efficiency and convenience.
  • Energy-efficient Pump: A pool pump designed to minimize energy consumption while maintaining proper water circulation. These pumps often feature variable speed or dual-speed options, allowing users to adjust the pump’s speed based on the pool’s needs, resulting in significant energy savings.


  • Filter Media: The material used in a pool filter to trap and remove debris and contaminants from the water. Common filter media include sand, diatomaceous earth (D.E.), and cartridge elements. The choice of filter media depends on the type of filter and its specific requirements.
  • Flow Switch: A device that monitors water flow and activates or deactivates pool equipment based on the presence or absence of flow. It ensures the equipment, such as heaters or chlorinators, only operate when water flow is detected, preventing damage caused by running equipment without water circulation.
  • Floating Dispenser: A device designed to hold pool chemicals, such as chlorine or bromine tablets, and float on the water’s surface. It releases chemicals gradually, helping to maintain proper sanitation levels throughout the pool and eliminating the need for manual dosing.


  • Gasket: A seal made of rubber or other materials used to prevent leaks between two connecting parts. Gaskets are commonly found in pool equipment such as pumps, filters, and valves, ensuring a tight and secure seal to prevent water or air leakage.
  • Ground Fault Circuit Interrupter (GFCI): A safety device that quickly shuts off power if electrical current is detected outside the normal path. GFCIs are crucial for protecting swimmers from electric shock and are typically installed in areas where water and electricity are present, such as near pool pumps, lights, and outlets.
  • Gas Heater: A type of pool heater that utilizes natural gas or propane to heat the pool water. Gas heaters are known for their quick heating capabilities, making them ideal for larger pools or situations where immediate heat is desired. They offer efficient and reliable heating performance.


  • Heat Exchanger: A device that transfers heat from one medium to another, such as heating pool water using the heat from a gas or electric heater. The heat exchanger allows for efficient heat transfer without direct contact between the heating source and pool water.
  • Hydrostatic Relief Valve: A valve installed in the pool’s main drain or bottom to prevent damage to the pool shell due to hydrostatic pressure. It automatically releases water from beneath the pool when pressure builds up, helping to prevent structural damage or floating of the pool.
  • Heat Pump: A pool heating system that utilizes ambient heat from the air or ground to warm the pool water. Heat pumps work by transferring heat energy from the surrounding environment into the pool water through a refrigeration cycle. They are energy-efficient alternatives to traditional gas heaters and can maintain desired water temperatures for comfortable swimming.
  • Heater Bypass: A heater bypass is a plumbing configuration used to divert water flow away from the pool heater, allowing for maintenance or winterization without affecting the overall pool circulation. It consists of a bypass valve and plumbing connections that enable water to bypass the heater when necessary. Heater bypass systems provide convenience and efficiency in servicing or isolating the heater while maintaining proper water circulation.
  • Hose Clamp: A hose clamp, also known as a hose clip or hose band, is a device used to secure hoses and connections in the pool plumbing system. It consists of a metal band and a screw mechanism that tightens around the hose, ensuring a secure and leak-proof connection. Hose clamps are essential for maintaining the integrity of the plumbing system and preventing water loss or damage caused by loose connections.


  • Impeller: A rotating component inside a pump that moves water, generating flow and pressure. The impeller is designed with curved blades or vanes that push water outwards, creating a centrifugal force that propels water through the pump and the pool’s circulation system.
  • Inlet Fitting: A fitting or nozzle through which water enters the pool or pool equipment. Inlet fittings are strategically positioned to ensure proper water circulation and distribution within the pool, contributing to effective filtration and maintaining a balanced pool environment.
  • Intake Strainer: A component located on the suction side of the pool pump that prevents debris from entering the pump and clogging the impeller. It typically consists of a removable basket or screen that captures leaves, twigs, and other larger particles, safeguarding the pump and preserving its performance.
  • Intake Valve: An intake valve, also known as a suction valve or skimmer valve, is a valve that controls the amount of water flow entering the pool’s circulation system. It is typically installed near the skimmer and main drain lines and can be adjusted to regulate the suction or flow rate. Intake valves are crucial for maintaining the proper balance of water circulation and preventing excessive suction or inadequate skimming.
  • Ionizer: An ionizer, also referred to as an ionization system or mineral sanitizer, is a water treatment device used to sanitize pool water by releasing copper or silver ions into the water. The ions help inhibit the growth of algae and bacteria, reducing the need for chlorine or other sanitizing chemicals. Ionizers are often used as alternative or supplemental sanitizing methods to maintain clean and clear pool water.
  • In-floor Cleaning System: An in-floor cleaning system, also known as a pop-up or built-in cleaning system, is a type of automatic pool cleaning system built into the pool floor. It consists of strategically placed pop-up nozzles that release jets of water to push debris toward the main drain or skimmer. In-floor cleaning systems provide efficient and comprehensive cleaning coverage, minimizing the need for manual cleaning and enhancing overall pool cleanliness.


  • Jandy Valve: A brand of multiport valves used for controlling water flow and directing it to different pool equipment. Jandy valves are known for their durable construction and versatility, allowing for efficient operation and maintenance of various pool systems, such as filters, heaters, and water features.
  • Jet: A nozzle or outlet through which water is forcefully discharged into the pool. Jets are commonly found in spas, hot tubs, and certain pool designs, providing hydrotherapy, water features, or enhanced water movement for a more enjoyable and therapeutic swimming experience.
  • Jet Pump: A jet pump, also known as a well jet pump or water jet pump, is a type of pump used in some pool systems to draw water from a well or other water sources. It utilizes the Venturi effect to create suction, pulling water into the pump and subsequently through the pool’s circulation system. Jet pumps are commonly used in pool setups where the water source is located below the pool level or when additional water pressure is required. They are versatile and efficient pumps that can handle both water supply and circulation tasks, ensuring proper water flow and distribution in the pool.
  • J-Hook: A J-Hook is a type of pool liner attachment system commonly used for above-ground pools. It consists of a J-shaped hook that securely holds the pool liner in place along the top edge of the pool wall. J-Hooks provide a simple and reliable method for attaching and securing the pool liner, ensuring a snug fit and proper alignment.
  • Junction Box: A protective enclosure that houses electrical connections and wiring for pool equipment. Junction boxes are designed to safeguard electrical connections from moisture, debris, and potential damage, ensuring the safety and reliability of the electrical system within the pool area.
  • Jumper Wire: A jumper wire, also known as a bonding wire or bonding jumper, is a conductor used to establish electrical bonding or continuity between metal components in the pool. It ensures that all metal parts, such as handrails, ladders, or pumps, are electrically interconnected to prevent the risk of electrical shocks. Jumper wires play a crucial role in maintaining proper electrical grounding and safety in the pool environment.


  • K-Valve: A type of diverter valve commonly used in pool plumbing systems. The K-Valve allows users to redirect water flow to different sections of the pool, such as the spa, water features, or auxiliary equipment, providing flexibility in controlling water circulation and enhancing pool functionality.
  • Key Valve: A key valve, also known as a shut-off valve or gate valve, is a type of valve used to control the flow of water through a pipe or plumbing system. Key valves are typically operated by turning a handle or key-shaped lever to open or close the valve. They are commonly used in pool plumbing to isolate specific sections or components of the circulation system for maintenance or repairs.
  • Kick Plate: A protective plate or panel installed at the bottom of a pool ladder or step to prevent damage caused by foot traffic. Kick plates are typically made of durable materials like stainless steel or plastic and help extend the lifespan of the ladder or step by offering a sturdy surface for users to step on.
  • Kilovolt-Ampere (kVA): Kilovolt-ampere (kVA) is a unit of apparent power used to measure the total power consumption or generation capacity of electrical equipment. In the context of pool equipment, kilovolt-amperes are relevant for assessing the power requirements of devices such as pumps, heaters, or lighting systems. Understanding the kVA rating helps ensure proper electrical supply and prevent overloading of circuits
  • Kink: A kink refers to a sharp bend or twist in a hose or pipe that obstructs or restricts the flow of water. Kinks can occur in pool hoses, vacuum hoses, or plumbing lines, disrupting water circulation or reducing the efficiency of pool equipment. It is important to address kinks promptly by straightening the affected hose or addressing the underlying cause to maintain optimal water flow and equipment performance.
  • Knife Valve: A type of valve with a flat, sharp-edged gate that is raised or lowered to control water flow. Knife valves are often used in applications where a reliable and precise shut-off is required, such as isolating specific sections of the pool plumbing system for maintenance or repairs.


  • LED Pool Light: A type of pool light that utilizes light-emitting diodes (LEDs) as the light source. LED pool lights offer energy efficiency, long lifespan, and a variety of color options, allowing pool owners to create vibrant and visually appealing lighting effects in their pools.
  • Leak Detection: Leak detection refers to the process of identifying and locating leaks in the pool plumbing system or equipment. Pool leaks can occur in pipes, fittings, valves, or the pool structure itself and can lead to water loss, equipment damage, or structural issues. Leak detection methods include visual inspections, pressure testing, dye testing, or the use of specialized leak detection equipment to pinpoint the exact location of the leak for repair.
  • Leveler: A device used to measure and adjust the water level in the pool. Pool levelers are equipped with sensors that detect water levels and can automatically add or drain water to maintain the desired level. They ensure proper water circulation, prevent equipment damage, and help maintain the overall balance of the pool.
  • Liner: The liner refers to the waterproof material that lines the interior surface of the pool, providing a barrier between the water and the pool structure. Pool liners are typically made of vinyl or other synthetic materials and come in a variety of patterns and colors. They not only enhance the aesthetic appeal of the pool but also protect the pool’s structural integrity.
  • Low Voltage: Low voltage refers to an electrical system or device that operates at a lower voltage level than the standard household voltage. In the context of pool equipment, low voltage is commonly associated with lighting systems, control panels, or automated features. Low-voltage systems provide enhanced safety as they carry a reduced risk of electrical shock and are often used in and around pool areas to ensure electrical compliance and minimize potential hazards.


  • Main Drain: An opening located at the bottom of the pool that serves as an intake point for water to be circulated through the filtration system. The main drain helps remove debris and maintain proper water circulation, contributing to the overall cleanliness and clarity of the pool.
  • Manifold: A manifold is a plumbing component used to distribute water flow to multiple outlets or plumbing lines. In the context of pool equipment, a manifold is often found in heater systems or multi-port valves. It serves as a central connection point, dividing the water flow and directing it to different destinations within the pool system, ensuring balanced distribution and proper functioning of various components.
  • Multiport Valve: A type of valve commonly used in sand filters that allows for multiple functions, including filtration, backwashing, rinsing, recirculation, and more. The multiport valve simplifies the operation and maintenance of the pool’s filtration system, providing versatility and ease of use.
  • Molded Fitting: A molded fitting is a pre-formed plumbing fitting used in pool systems. These fittings are manufactured by molding a specific shape or configuration, ensuring precise dimensions and consistent performance. Molded fittings are commonly made of PVC or other durable materials and are used to connect pipes, valves, or equipment components securely, ensuring leak-free connections and efficient water flow.
  • Motor: The electrical device that powers the pool pump, providing the necessary energy for water circulation. Pool pump motors are available in various horsepower ratings to accommodate different pool sizes and flow requirements, ensuring efficient water movement and filtration.


  • Natural Gas Heater: A type of pool heater that utilizes natural gas as the fuel source to heat the pool water. Natural gas heaters are known for their efficiency and quick heating capabilities, making them a popular choice for pool owners looking for rapid heat-up times.
  • Niche: A housing or recessed area in the pool wall or floor that accommodates pool lights, water jets, or other pool equipment. Niche installations ensure proper positioning, protection, and secure mounting of these components within the pool structure.
  • Non-Return Valve: A non-return valve, also known as a check valve or one-way valve, is a plumbing device that allows water flow in one direction while preventing backflow or reverse flow. Non-return valves are commonly used in pool plumbing systems to ensure that water flows properly through the circulation system and prevents the water from flowing back into the pool. They help maintain the desired flow direction and prevent equipment damage caused by backflow.
  • Nozzle: A device or attachment used to control the direction and flow of water from pool jets, water features, or other outlets. Nozzles come in various shapes and sizes, allowing for adjustable water patterns and enhancing the aesthetics and functionality of the pool.


  • O-Ring: A round rubber or synthetic gasket in the shape of a ring, used to create a watertight seal between two connecting parts. O-rings are commonly found in pool equipment, such as pumps, filters, valves, and unions, and they help prevent leaks and maintain the integrity of the system.
  • Off-Gassing: Off-gassing refers to the release of volatile chemicals or gases from pool equipment or materials into the surrounding air. It can occur when certain components or materials, such as adhesives, coatings, or plastics, release fumes or gases as they age or when exposed to heat or sunlight. Off-gassing can contribute to indoor or outdoor air pollution and may cause unpleasant odors or respiratory irritation. Proper ventilation and choosing low-emission or environmentally friendly pool equipment and materials can help minimize off-gassing and maintain good air quality in and around the pool area.
  • Outlet: An outlet refers to a point of water discharge or flow from a pool or pool equipment. It can be a specific fitting or opening through which water exits the pool or a particular component. Examples of outlets in a pool system include return jets, water features, or drains. Outlets play a crucial role in water circulation, filtration, and maintaining the desired water balance and cleanliness in the pool.
  • Overflow Drain: A drainage system designed to prevent water from overflowing or flooding the pool. The overflow drain is typically located around the perimeter of the pool, slightly below the pool’s edge, and it allows excess water to drain out, helping to maintain the pool’s water level within a desired range.
  • Ozonator: A device that generates and injects ozone into the pool water to enhance water quality and sanitation. Ozone is a powerful oxidizer that can effectively kill bacteria, viruses, and other contaminants, reducing the reliance on traditional chlorine or other sanitizers and minimizing the associated chemical odors and irritations.


  • pH: pH stands for “potential of hydrogen” and is a measurement of the acidity or alkalinity of the pool water. It is an essential parameter to monitor and balance in pool maintenance. The pH scale ranges from 0 to 14, with 7 being neutral. A pH below 7 indicates acidity, while a pH above 7 indicates alkalinity. Maintaining the proper pH level is crucial for swimmer comfort, water clarity, and the effectiveness of sanitizers and other pool chemicals.
  • Pool Pump: A vital component of the pool circulation system responsible for pulling water from the pool, passing it through the filtration system, and returning it back to the pool. Pool pumps create the necessary flow and pressure for proper water circulation and filtration, ensuring clean and healthy pool water.
  • Pressure Gauge: A gauge installed on pool equipment, such as filters or pumps, to measure the pressure within the system. The pressure gauge provides valuable information about the efficiency and condition of the equipment. By monitoring the pressure, pool owners can detect issues such as clogged filters or restricted flow.
  • Pressure Relief Valve: A pressure relief valve, also known as a safety valve or pressure release valve, is a crucial safety device installed in pool equipment to prevent excessive pressure buildup. It is designed to automatically open and release water when the pressure inside the system exceeds a certain threshold, protecting the equipment from damage or failure. Pressure relief valves are commonly found in pool filters, heaters, and other high-pressure components.
  • Priming: The process of removing air from the pool pump and plumbing system to create a vacuum and enable water flow. Priming is essential for the proper functioning of the pool pump as it ensures that water is effectively drawn from the pool and prevents airlocks or insufficient water circulation.
  • PVC: PVC stands for polyvinyl chloride and is a commonly used material in pool plumbing and equipment. It is a durable, corrosion-resistant, and cost-effective plastic that is widely used for pipes, fittings, and valves. PVC pipes are known for their ease of installation, longevity, and ability to withstand high-pressure applications. PVC components are often used in pool plumbing systems to ensure reliable water flow and prevent leaks or breaks.


  • Quick Disconnect: A type of fitting or coupling that allows for the quick and easy connection or disconnection of pool equipment. Quick disconnects are commonly used in applications such as connecting hoses to pumps, filters, or other components, enabling efficient equipment installation, maintenance, and repairs.
  • Quick Clean Cycle: A feature available in some pool cleaning systems, such as robotic cleaners or automatic pool cleaners, that provides a shorter and more expedited cleaning cycle. The quick clean cycle option is ideal for situations where a quick touch-up or spot cleaning is needed, saving time and energy while still maintaining the pool’s cleanliness.
  • Quartz Sand: A type of sand used as the filter media in sand filters. Quartz sand has excellent filtration properties, effectively trapping and removing debris and particles from the pool water as it passes through the filter. The use of quartz sand ensures optimal filtration performance and helps maintain crystal-clear pool water.


  • Reducer: A fitting or adapter used to connect pool equipment or plumbing components of different sizes. Reducers allow for the transition from a larger pipe or connection to a smaller one, ensuring compatibility and proper flow within the pool’s plumbing system.
  • Retaining Ring: A retaining ring, also known as a snap ring or circlip, is a small metal ring used to secure or hold components in place within pool equipment. It is typically installed in a groove or recessed area on a shaft or spindle and prevents the component from sliding or coming loose during operation. Retaining rings are commonly found in pumps, motors, and other pool equipment that have rotating or moving parts.
  • Return Jet: A fitting or nozzle through which filtered and treated water is returned back into the pool. Return jets are strategically positioned around the pool to ensure proper water circulation and distribution, helping to maintain a consistent water temperature and chemical balance throughout the pool.
  • Robotic Pool Cleaner: An advanced type of pool cleaner that operates independently, utilizing artificial intelligence and advanced cleaning technology to thoroughly clean the pool. Robotic pool cleaners are equipped with brushes, filters, and motors, allowing them to efficiently remove debris, scrub surfaces, and navigate the pool autonomously, reducing the need for manual cleaning.


  • Salt Chlorine Generator: A system that uses electrolysis to convert salt into chlorine, eliminating the need for traditional chlorine tablets or liquid. The salt chlorine generator produces chlorine as needed, maintaining proper sanitization levels in the pool water. It offers a convenient and automated way to keep the pool clean and safe.
  • Sand Filter: A sand filter is a type of pool filter that uses a bed of sand as the filtration medium. The filter tank contains a specific grade of sand that traps and removes particles, debris, and impurities from the pool water as it passes through the sand bed. Sand filters are known for their reliability, ease of maintenance, and affordability. They are effective in capturing large and small particles, ensuring cleaner and clearer pool water.
  • Safety Vacuum Release System (SVRS): A safety vacuum release system is a safety device installed in pool circulation systems to prevent entrapment or injury caused by a blocked or restricted drain. It senses changes in suction or water flow and, if a blockage is detected, automatically shuts off the pool pump or releases the vacuum to alleviate suction. SVRS devices are designed to protect swimmers from being trapped by the powerful suction of the pool drain, reducing the risk of accidents or drowning.
  • Skimmer: A device installed at the edge of the pool that collects and removes floating debris, such as leaves, bugs, or surface oils, from the pool water. Skimmers contain a basket or filter where the collected debris is captured, preventing it from entering the pool’s circulation system and helping to maintain cleaner water.
  • Skimmer Basket: A removable basket located inside the skimmer that captures larger debris before it enters the pool’s filtration system. Skimmer baskets are easily accessible and should be regularly cleaned or emptied to ensure optimal skimming performance and prevent clogs in the plumbing system.
  • Suction Fitting: A suction fitting, also known as a suction inlet or suction port, is a component of the pool’s plumbing system that allows water to be drawn into the pool circulation system. It is typically located in the pool wall or floor and connects to the pool pump or skimmer. Suction fittings play a crucial role in the circulation and filtration of pool water, ensuring efficient water movement and debris removal.
  • Sump Pump: A sump pump is a device used to remove excess water from areas surrounding the pool, such as the basement or equipment room. It is commonly used in cases of flooding or high water levels to prevent damage to property and equipment. Sump pumps work by pumping water out of a designated sump pit or collection area and redirecting it away from the pool area.


  • TDS (Total Dissolved Solids): TDS, or Total Dissolved Solids, refers to the measurement of all dissolved substances present in the pool water, including minerals, salts, metals, and organic compounds. High TDS levels can impact water balance, water clarity, and the effectiveness of pool chemicals. Regular monitoring of TDS levels helps ensure proper water quality and the need for appropriate water treatments or dilution.
  • Timer: A device or control mechanism used to automate the operation of pool equipment, such as pumps, heaters, or lights, based on predetermined schedules. Timers help conserve energy by allowing pool owners to set specific times for equipment activation and deactivation, ensuring efficient and timely operation.
  • Thermometer: A device used to measure the temperature of the pool water. Pool thermometers come in various forms, such as floating, digital, or remote sensors, allowing pool owners to accurately monitor and adjust water temperature for optimal comfort and enjoyment.
  • Turbo Cell: A component of a salt chlorine generator that contains a series of metal plates coated with a special material. The turbo cell facilitates the electrolysis process by which salt is converted into chlorine for sanitizing the pool water. It is an essential part of the salt chlorination system.
  • Turnover Rate: The turnover rate refers to the amount of time it takes for the pool’s entire volume of water to circulate through the filtration system. It is typically measured in hours. A higher turnover rate indicates more frequent filtration and better water quality. The turnover rate is influenced by factors such as the size of the pool, the flow rate of the pump, and the capacity of the filtration system. Achieving an appropriate turnover rate is crucial for maintaining clean and healthy pool water.


  • Underwater Light: A light fixture specifically designed and sealed to be installed underwater in the pool. Underwater lights illuminate the pool water, enhancing visibility and creating an inviting atmosphere for nighttime swimming or poolside gatherings. They come in various colors and designs to suit different aesthetic preferences.
  • Unions: Fittings or connectors used to join sections of pool equipment or plumbing together in a secure and leak-proof manner. Unions allow for easy disconnection and reconnection of equipment for maintenance or repairs without having to cut or modify the plumbing system. They provide convenience and flexibility during pool equipment installation and servicing.
  • UV Sanitizer: A system that utilizes ultraviolet (UV) light to disinfect and sanitize pool water. UV sanitizers use UV-C rays to destroy harmful microorganisms, including bacteria, viruses, and algae, without the need for additional chemicals. UV sanitation provides an effective and eco-friendly method of water treatment, reducing the reliance on traditional sanitizers.


  • Vacuum Head: A tool attached to the pool pole and used in conjunction with a vacuum hose to manually clean the pool’s floor and walls. Vacuum heads typically have brushes or bristles to dislodge debris, while the suction from the pool’s filtration system pulls the debris into the vacuum’s collection bag or filter.
  • Valve: A device used to control the flow of water within the pool’s plumbing system. Valves can be manually operated or automated and are crucial for directing water to different areas, such as the pool, spa, or other water features. Common types of valves include gate valves, ball valves, and check valves.
  • Variable Speed Pump: A type of pool pump that allows the user to adjust the speed or flow rate of the pump motor. Variable speed pumps offer greater energy efficiency compared to single-speed or dual-speed pumps since they can be set at lower speeds when less flow is required. This feature can result in significant energy savings and reduced operating costs over time.


  • Wall Fitting: A fitting or connector installed in the pool wall that serves as an entry or exit point for water and electrical connections. Wall fittings may include water return fittings, pool light niches, or inlet fittings for water features. They are important components for water circulation, lighting, and the operation of various pool equipment, and proper maintenance ensures their functionality and integrity.
  • Water Leveler: An automatic device or mechanism installed in the pool that helps maintain a consistent water level. Water levelers are equipped with sensors that detect when the water level drops below a certain point and automatically add water to the pool to restore the desired level. They ensure that the pool remains properly filled without the need for manual monitoring and adjustment.
  • Weir: The hinged flap or door located in the skimmer that helps regulate water flow and prevents debris from re-entering the pool when the pump is turned off. The weir allows water to enter the skimmer while trapping leaves, bugs, and other debris on the surface, ensuring efficient skimming and preventing clogs in the filtration system


  • Xenon Pool Light: A type of pool light that uses xenon gas to produce bright and vibrant illumination. Xenon pool lights are known for their excellent color rendering capabilities, providing a visually appealing and well-lit swimming environment. They are energy-efficient and have a longer lifespan compared to traditional incandescent pool lights.
  • X-Connector: A plumbing fitting that connects multiple pipes or hoses in a cross formation. X-connectors allow for the diversion or distribution of water flow between different sections of the pool’s plumbing system. They are commonly used in complex plumbing setups or when multiple connections need to be made at a central point.
  • X-Drive Motor: An advanced type of motor commonly used in high-performance pool pumps. X-drive motors feature a brushless design, which reduces friction and extends the motor’s lifespan. They offer increased efficiency and quieter operation compared to traditional motors, making them a popular choice for energy-efficient pool pump systems.


  • Yard Drain: A drainage system or channel designed to collect and divert excess water from the pool area and surrounding yard. Yard drains help prevent water accumulation, which can lead to flooding, soil erosion, or damage to the pool and its equipment. They are typically installed in low-lying areas or where water runoff is a concern.
  • Y-Strainer: A type of strainer or filter installed in the pool plumbing system to remove debris and particles from the water flow. Y-strainers have a Y-shaped body with a removable screen or mesh filter inside. They are typically placed before vital equipment, such as pumps or heaters, to prevent clogs and protect the components from damage caused by debris.
  • Y-Connector: A plumbing fitting that allows the branching of two or more pipes or hoses in a Y-shaped formation. Y-connectors enable water flow to be redirected or combined between different sections of the pool’s plumbing system. They are commonly used to create multiple outlets for water circulation, such as in water features, or to connect various pool equipment for efficient operation.


  • Zeta Potential: Zeta potential refers to the measurement of the electrical charge on particles suspended in the pool water. It is an important parameter that affects the stability and coagulation of particles in the water. By understanding and controlling the zeta potential, pool owners can effectively manage water clarity, filtration, and the overall balance of the pool chemistry.
  • Zero-Clearance Pump: A type of pool pump designed for installations where space is limited. Zero-clearance pumps feature a compact design and are specifically engineered to fit into tight spaces without compromising performance. These pumps are ideal for retrofitting or situations where traditional-sized pumps may not be suitable due to space constraints.
  • Zoning System: A control system that divides the pool into separate zones or areas, each with its own equipment and settings. Zoning systems allow for customized control and management of different pool features, such as waterfalls, spa jets, and lighting. By independently regulating each zone, pool owners can optimize energy efficiency, tailor the pool experience, and effectively troubleshoot any equipment issues within specific areas of the pool.

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