Hayward DE7220 integration with Hayward ECOSTAR SP3400VSP; minimum RPM requirements

[mas985]

I can also calculate head loss with just filter pressure and a description of the suction side plumbing. Those were the questions I had asked in the second post. You can also do this yourself with one of my spreadsheets:

Pool Spreadsheets Link

The EcoStar spreadsheet can calculate flow rate from just RPM and wattage. The Pool Pump Tools spreadsheet is more generic and a bit more accurate and can calculate flow rate for many different pumps in several different ways.

But again, knowing the exact flow rate of the pump really doesn't help you any. It just doesn't matter.

For reference, your current flow rate is around 82 GPM and on solar it is about 69 GPM. To match the same solar rate, the EcoStar would need to be set at about 3000 RPM.