Quote Originally Posted by Sumo1 View Post
Lately I've been having filter pressures up to 30psi in a matter of days and even after I backwash 2 or 3 times, the pressure doesn't go below 20psi. It is definitely time to break down the filter and clean it but I can never get down to the 12-13psi range that I want. I wonder if the pump is just too big for the filter or whether the filter should be larger. The pump is about 27' from the main drain(horizontally). The plumbing is 2". I've read a lot lately about 2 speed pumps but don't know what size would be adequate or how you would use the 2nd speed. Thanks for any help and/or opinions. I LOVE this website!!!
The 2 HP pump is oversized for general circulation but you need it for the spa jets. A 2 speed pump would probably be the easiest change to make. You can use low speed for general filtering and circulation and high speed for the the spa jets.

My guess is you are running at least 60 feet of head when clean and over 75 feet of head when dirty. A 2 HP high efficiency pump should deliver about 110 GPM at 60' which would be about 4 hours of turnover. A two speed pump 2 HP on low speed would be about 8 hour turnover which is perfect for your pool.

Also, Is there a reason the filter gets dirty so quickly? Is it a new plaster pool?