# Flow Rate

Also Known As: Rate of Flow

The pool pump circulates the water through the filtration and chemical cleaning system. A proper flow rate pulls all of the water through the system within a particular period of time. The right sized pump will deliver the flow rate that is needed for a particular pool.

If a pump is too large, the energy costs can climb. If a pump is too small, the water may not be filtered properly.

Flow rate depends on the size of the pool and the turnover rate  or the desired rate that the pools water is circulated. An online calculator can find the flow rate, or it can be calculated by hand very easily. First, find the capacity of the pool (length x width x average depth), by multiplying the volume of the pool (in feet) by 7.5 (the number of gallons in a cubic foot). The result is the number of gallons of water that the pool can hold. Divide this value by the desired turnover rate  6 hours, 8 hours or 10 hours. Finally, divide the answer by 60 to find the minimum flow rate per minute. Use a chart to find a pump that matches the flow rate of the pool.

A flow meter will show the flow rate of the pump at any given time. If the pump is the proper size, a flow rate that is either too low or too high could indicate a problem with the pump or filtering system.