There is a formula for anything that you need to accomplish with regards to swimming pools, spas and hot tubs. Whether it’s a chemical adjustment or a piece of equipment that you need to replace and you want to be sure it’s the right size.
This article, as is stated in the title, is about how to calculate the flow rate of the pool water running through your system. This is an important calculation upon which many other pool formulas are based. In commercials pools and spas this is regulated by the State or Local Environmental Health Services and minimum flow rates are required.
Formula:
Pool Volume (gal) / Turnover Rate (minutes) = Flow Rate in GPM
In California (at this writing) the required turnover rates are:
Pools = 360 minutes (or 6 hours)
Spas = 30 minutes (1/2 hour)
Ex: a 40,000 gal pool would be: 40,000 / 360 = 111 GPM
Article by: Jef Kirchmaier, CPO, CPT, AEA, WQM
http://www.cpo2go.com
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