Better Practices

The pool water is drawn thru the skimmer during pump filtration

The flow is typically 15 rpm to 45 gpm. 

The water level is normally kept at one inch above the center point of the skimmer. 

Higher flows can pull air into the piping. 

Sand filters are rated at a maximum flow rate of 20 rpm per sq. ft. of filtration media surface area. This flow rate and resulting pressure can force debris deep into the filter bed.

15 gem per sq. ft of filtration media surface area is recommended for superior water clarity and ease of backwash. 

Cartridge filters are rated at .375 gpm. per sq. ft. of filter media for commercial pools. 

This flow rate can be used for residential pools also as the pleats don't get packed and are easier to clean. 

Knowing the flow rate is key for saving money and optimizing your filtration operation. 

Match the skimmer flow with the filtration flow by adjusting the pump speed. 

Normal flow rate is turning over the entire pool volume in 6 to 8 hours. 

A variable speed pump adjusts the flow rate through the skimmer and filter. 

You are able to save considerable money and energy with this type of pump. 

By lowering the flow by 1/2 saves 7/8 of the energy. 

Best to operate the system around 30 gpm for the time that it takes to filter 100%  of the pool water in one day.