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Pool Terms

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Glossaries

  • Pool Care Terms
Term Definition
Calcium chloride (CaCl2)

A soluble white salt used to raise the calcium hardness of pool and spa water.

Calcium hypochlorite (Ca(OCl)2)

A solid white form of inorganic chlorine found in both granular and tablet forms, it has a pH of approximately 11 and is 65.70 percent available chlorine.

Cantilever type deck structure

A deck structure that relies on the pool structure for support. Free-Standing type: A deck structure that that does not rely on the pool structure for support.

Cartridge

A depth, pleated or surface-type filter component with fixed dimensions and designed to remove suspended particles from water flowing through the filter.

Cartridge filter

A filter that utilizes a porous element that acts a s filter medium. The cartridge is disposable.

Chemical feeder

A mechanical device for applying chemicals to pool or spa water.

Chloramine

A compound formed when chlorine combines with nitrogen and ammonia, which causes eye and skin irritation and has a strong, objectionable odor.

Chlorinator

A device used to apply or to deliver a chlorine disinfectant to water at a controlled rate.

Chlorine generator

Equipment that generates chlorine, hypochlorous acid, or hypochlorite on-site for disinfection and oxidation of water contaminants. Most commonly a salt conversion / chlorine generator which converts sodium chloride (salt) to sodium hypochlorite (bleach) which disinfects the water.

Circulation system

An arrangement of mechanical equipment or components, connected by piping to a pool or spa in a closed circuit. The function of a circulation system is to direct water from the pool or spa, causing it to flow through the various system components for purposes of clarifying, heating, purifying and returning the water back to the original body of water.

Clarifier (also called Coagulant or Flocculant)

A chemical that coagulates and neutralizes suspended particles in water. There are two types: inorganic salts of aluminum or iron, and water-soluble organic polyelectrolyte polymers.

Combined chlorine

The portion of the total chlorine existing in water in chemical combination with ammonia, nitrogen, and/or organic compounds; mostly comprised of chloramines.

Coping

The cap on the pool or spa wall that provides a finishing edge around the pool or spa. Can be formed, cast in place or pre-cast, or pre-fabricated from metal or plastic materials. It may be used as part of the system that secures a vinyl liner to the top of the pool wall.

Cyanuric acid

Also called Stabilizer, Isocyanuric acid, Conditioner or Triazinetrione, a chemical that helps reduce the excess loss of chlorine in water due to the ultraviolet rays of the sun.

Pool School

CPOThe Certified Pool Operator (CPO) training is designed to provide individuals with the basic knowledge, techniques, and skills of pool and spa operations.

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