Quote Originally Posted by mas985
Without a vacuum measurement, that is about a close as you will get. 32 is pretty low for head. Must be large pipes and a weak pump. Do you have a head curve for that pump? Just curious why the GPM is for that head.

Here's the data sheet and head curve PDF for my pump-

http://www.pentairpool.com/misc/pdfs...ynamo_pump.pdf

It's a 1 hp motor. It's also for an AG pool, and I have an IG. This is the pump that came with the pool when we bought the house, and when it burned out 4 years ago this is the same pump the pool store replaced it with (long before I started paying attention and asking questions ).

All my piping is 1.5". I'm trying to calculate GPM, which is why I needed to know the head

I have been thinking of a 3/4 HP whisperflow, but as long as this one is working, I don't need to spend the money.