EFFICACY:

The power to produce an effect. Chlorine's efficacy is affected by many factors, including the sun, water balance, and the water's chlorine demand.

 

EFFLUENT:

The water that flows out of the pump on its way through the filter, heating, treating equipment, and then returning to the pool. Also known as the pressure side.

 

ELBOW:

A 90 or 45 degree plumbing fitting. Used where your pipes take a turn

 

ELECTROLYSIS:

A method of separating chemically bonded elements and compounds by passing an electric current through them.

 

ENZYMES:

Used in swimming pool formulations designed to break down and digest oils in a pool or spa similar to the way enzymes are used in oil spill clean-up efforts.