What type of overflow do you have and what is the flowrate rating?
If you have an internal overflow pump size is not critical anything from 0-100% of the overflows rating is fine. HOB overflows are a little more finicky, you need to select a pump that can returm 70-100% of the overflows rating after headloss is subtracted.
Originally Posted by shwstpr88 http:///forum/post/2889002
How do i find that out? I have two internal over flows with looks to be two 2in holes in each overflow.
I have a 125 with two predrilled holes 2". I use two 1200 gph return pumps. Works great.
What are you planning on having in the sump? If you are going to have a skimmer in your sump you want to have enough flow to give the skimmer a constant supply of dirty water.