On Sat, 26 May 2012 22:51:25 -0700, "Bob F" wrote:

Arklin K. wrote:
On Sat, 26 May 2012 21:52:41 -0700, DD_BobK wrote:

Dial back on the theory....no need to replace 90's with sweep 90's.
There is no way you need a fourth pump.

Thanks for the advice. I'm not sure what a '90' is but the pool was
built in 2001 and it's complicated. Too complicated. It's certainly
not KISS.

btw 5' of head is about 2 psi..... not a lot pressure.

Interesting. If it were me, I would have put the pumps at the same
level as the pool deck.


Then, you would have to worry about priming them.

Most will self prime that far. If not, a little water in the pump basket is
enough. If there aren't any leaks the pump will stay primed.