A member of the family of elements: fluorine, bromine, chlorine and iodine.
That water which is high in calcium hardness and other salts which, as such, resists soap being lathered.
A hazardous material, a term used almost exclusively in the United States, is any solid, liquid, or gas that can harm people, other living organisms, property, or the environment. Hazmats may be radioactive, flammable, explosive, toxic, corrosive, biohazardous, an oxidizer, a pathogen, an allergen, or may have other characteristics that render it hazardous in specific circumstances.
A set of 8 or 10 ribbed copper tubes that absorb the heat produced below it and transfer it to the water cycling through its tubes.
The antithesis of the air conditioner, the heat pump's cooling coil removes heat from the air while the condenser coil transfers it to water cycling through it.
A device used to heat the water. It may be electric, fuel operated, or solar powered.
Usually considered a circular, wooden vessel filled with heated and circulated water.
The name of several non-metric units of power. The most occurring conversion of horsepower to watt goes 1 horsepower = 745.7 watts.
A force involving built up ground water which creates upward pressure beneath the pool shell.
Fitting(s) installed in the floor of the pool designed to manually or automatically release hydrostatic pressure beneath the pool by allowing ground water into the pool.
The most common name for the diatomic anion OH?, consisting of oxygen and hydrogen atoms, usually derived from the dissociation of a base. It is one of the simplest diatomic ions known.
A family of chlorine compounds such as Calcium Hypochlorite and Lithium Hypochlorite, both granular, and the liquid Sodium Hypochlorite. When these compounds contact water, they release Hypochlorous Acid, the active sanitizing agent.
The killing form of chlorine. It is formed when chlorine is added to water. Cl2 + H2O ® HOCl + HCl