Pool Pump Sizing

Below we ll run through how to easily figure it out step by step and choose your pool pump confidently.

Pool pump sizing. We will use that gpm to calculate our pool s feet of head. Length x width x average depth x 6 9 pool capacity in gallons round. You have now completed your pool pump sizing and will be able to purchase a pool pump that will work efficiently and safely with your pool system. If you want to turn over your 20 000 gallons once in 5 hours you will need to average at least 67 gallons per minute gpm.

This will eventually burn out the pump motor and your filtration will also be compromised. If your pool filter is too small for the pump there will be additional strain on the pump motor as it tries to push water through and encounters resistance at the filter. The first step in sizing your pool is to know the volume of water in your pool which is the average depth. An ideal turnover time is 8 10 hours.

How to figure out what pool pump size you need. Calculate minimum flow rate. Length x width x average depth x 7 5 pool capacity in gallons oval. Length x width x average depth x 5 9 pool capacity in gallons free form.

Measure the shallow end depth. How to determine gallonage. There are a few primary factors that go into finding the right size pool pump. Multiply the pump vacuum by 1 13 to measure resistance before the pump add the two together to compute the total resistance in the system.

A pump s flow rate is dependent on the feet of head of your plumbing system and that measurement is featured in every pump curve chart. You might think bigger is better in terms of pump size but a pump that is too big can cause serious problems. Use this formula to determine your turnover rate. The size of your pool filter is directly related to the pool pump you have selected.

50 60 tdh or feet of head. From industry standard single speed pumps to energy efficient variable speed pumps all delivering powerful reliable performance. Hayward has the broadest lineup of pool pumps in the industry assuring you will have the perfect pump for your pool. Determine your flow rate range.

Determine maximum flow rate. Oversizing pumps have become such an issue that the state of california a big pool state recently enacted a law to control how big of a pump could be placed in a swimming pool. The first thing to determine is the desired turnover time or in layman terms how long it takes for the pool pump to cycle all of the swimming pool s water completely. Pool volume in gallons turnover rate in minutes flow rate.

Now most pool owners don t have a vacuum gauge installed before the pump. If you can get of a vacuum gauge not a pressure gauge unscrew the front pump drain plug and thread the vacuum gauge in its place. Measure the deep end depth. Water pumps of 1 1 5 and 2 horsepower are very common and for the average size pool very oversized.

22 5 60 gpm or flow rate range.