Figuring Flow Rate

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But a heater's operation is dictated not on flow rate but on pressure.

@mas985: Thanks for replying. The reason I said the heater required a minimum flow is because the Service and Installation Manual specifies minimum flow on page 26 here: https://www.hayward-pool.com/pdf/man...stallation.pdf

If you want more than guess, I would need a picture of your equipment setup and also the filter pressure on high speed.

The pressure on high is 15 psi. I'll send pictures tomorrow.

Thanks!