Tim W, I was designing a system today that had a similar situation as yours.I thought I would pass along a number that I had our Aeration Manager at Vertex (Sue Cruz) confirm. A client asked just how far away we could put this pump from the pond bank.This particular Brookwood piston pump produces 2.67 CFM open flow (this is a small single piston pump)and has a diffuser that requires 2 CFM (XL model)in 12 ft of water. This small system can have an airline 17,000ft (thats seventeen thousand)and still have 2.23 CFM at the diffuser with a back pressure reading of 30 PSI (pump good to 35 psi)So again if you match the pump and diffuser to your needs and your situation it can easily be done, PS Eastland, that would be a lot of trenching in your neck of the woods !! Ted
