Divide the pool into the above shapes then add together.
Pool pump sizing.
This will eventually burn out the pump motor and your filtration will also be compromised.
50 60 tdh or feet of head.
Calculate minimum flow rate.
You might think bigger is better in terms of pump size but a pump that is too big can cause serious problems.
Length x width x average depth x 5 9 pool capacity in gallons free form.
Calculate the volume of your pool.
Measure the deep end depth.
22 5 60 gpm or flow rate range.
Pool volume in gallons turnover rate in minutes flow rate.
There are a few primary factors that go into finding the right size pool pump.
How to figure out what pool pump size you need.
Measure the shallow end depth.
We will use that gpm to calculate our pool s feet of head.
How to determine gallonage.
Use this formula to determine your turnover rate.
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.
Now most pool owners don t have a vacuum gauge installed before the pump.
Determine your flow rate range.
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.
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.
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.
Length x width x average depth x 6 9 pool capacity in gallons round.
Length x width x average depth x 7 5 pool capacity in gallons oval.
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.
Hayward has the broadest lineup of pool pumps in the industry assuring you will have the perfect pump for your pool.
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.
Below we ll run through how to easily figure it out step by step and choose your pool pump confidently.
Water pumps of 1 1 5 and 2 horsepower are very common and for the average size pool very oversized.
We can see that for our example pool we can determine the following.
The size of your pool filter is directly related to the pool pump you have selected.
An ideal turnover time is 8 10 hours.
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.
Determine maximum flow rate.
