Water cycle

[crosso]

How can I tell how long it takes to cycle the water through the pump in my pool?
18 x 36 rectangle, vinyl diving pool, 3.5' - 8', 8' wide steps that stick out of the side.

[CarlD]

Questions:
How many gallons?
What type of pump (brand, model, hp)?
What type of filter (Brand, model)?
Size of pipes (ex: 1 1/4, 1 1/2, 2")?
Length of piping, numbers of turns....?
Number of drains, skimmers and returns?

[mas985]

Turnover is the time it takes for the volume of the pool to run through the pump. However, this does not mean that all of the water has gone through the pump. Some water goes through twice and some non at all. It depends on the plumbing, returns, skimmers and drains. To determine turnover:

First, determine the head loss for your plumbing. A rough estimate is to take your PSI from the filter and multiply this by 2.31. If you do not have a vacuum gauge, add about 10' of head for suction head. Otherwise, multiple the vacuum (in. mg.) by 1.13 to get suction head. Add return head and suction head to get total head.

Second, look up the the flow rate from the pump head curve. Usually in the pump manual.

Third, use the formula turnover (hrs) = Pool Volume (gallons) / (gpm * 60)