Filter Run

Also known as the filter cycle, it is the time between cleanings or the the total running time of the system.

Flow Meter

Device used to measure the rate of water passing through a given pipe, expressed in gallons per minute (gpm).

Flow Rate

The volume of water passing, expressed in gallons per minute (gpm).

Gauge

A measuring device used to measure pressure on filtration systems.

Main Drain or Drain

A plumbing fitting installed on the suction side of the pump in pools, spas and hot tubs for circulation and filtration. It is usually located in the deepest part of the pool, hot tub or hot tub.

pH

A measure of the level of acidity or alkalinity of water on a scale ranging from 0-15. The ideal range for pH in swimming pools is typically 7.4 to 7.6.

Plaster

A combination of white cement, aggregates, and additives that covers the shell of a pool or spa.

Pressure Gauge

A device that registers the pressure in a water or air system, expressed in pounds per square inch (psi).

Pump Capacity

The volume of liquid a pump can move during a specified period of time, listed in gallons per minute or gpm.

Shock Treatment

The process of adding large amounts of an oxidizing chemical to the water to destroy ammonia and nitrogen compounds.

Shotcrete

Refers to a process in which compressed air forces mortar or concrete through a hoseand nozzle onto a surface at a high velocity.

Skimmer

A part of the circulation system that removes debris from the surface of the water.

Turbidity

Cloudiness

Turnover Rate

Amount of time required for a system to filter 100 percent of the pool water.

Valve

A device that controls the flow of water. Three common styles of valves are wafer, ball, and gate.