I'm designing an irrigation system which pulls from a river. The pump sits on land. I'm thinking of putting the 2" intake pipe + foot valve inside of a 6' long section of 4" well screen (well seal on one end a plug on the other...so all water has to go through the well screen. I'm concerned w/how much water i can pull through that screen and how much pressure loss if any it exhibits. The pump is somewhat sensitive to inbound pressure loss. rate = peaks out at around 24 gpm. I have a piece of well screen but i'm not sure of the slot width.