Right size filter and pump?

Jun 18, 2012
New home owner here which came with a 20+ year old pool. After having some suction problems - which I've cleared up - I did some research on filter and pump sizes. My IGP is 20x40 and holds 33,000 gal. According to this site http://www.swimmingpoolsetc.com/pool-fi ... mation.htm I should be running a 2hp pump with 60sf DE filter. My set up is 1 1/2hp pump and a 36sf DE filter. I don't know the size of the pipes.

Am I ok? It's not like I can do anything about this right now and the pool seems fine. Water was tested after 3 weeks and came back perfect. I did my first backwash last weekend and all seems good to go.


TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
Sure, you are alright where you are. Ideally you should have a smaller pump (or a two speed pump) and a larger filter. A smaller, or two speed, pump will save you money on electricity, and a larger filter will improve system efficiency and increase the amount of time between backwashing/cleaning the filter.