Glossary Terms

A cell, consisting of dissimilar metals in contact with each other and with an electrolyte, which generates an electrical current.

A unit of liquid volume; the U.S. gallon has a volume of 231 cubic inches or 3.785 liters; the Imperial (British) gallon has a volume of […]

One of several types of bacteria that use iron in their metabolism and are capable of depositing gelatinous ferric hydroxide. (See iron bacteria.)

See mineral acidity.

See free available chlorine.

Carbon dioxide present in water as gas, or as carbonic acid, but not that combined in carbonates or bicarbonates.

The vertical distance between a bed of filter media or ion exchange material and the overflow or collector for backwash water; the height above the bed […]

That portion of the total available residual chlorine composed of dissolved chlorine gas (Cl2), hypochlorous acid (HOCl), and/or hypochlorite ion (OCl–) remaining in the water after […]

The process in which undesirable foreign matter accumulates in a bed of water conditioning media, clogging pores and coating surfaces and thus inhibiting or retarding the […]