Well I've always wanted to check out how these pumps work, so I brought up your website, and now I have one. I now can't wait for the snow to melt so I can install it at my pond. I followed your directions and substituted brass spring check and flapper valves. I made a base out of some stainless pipe I had behind the barn.
I still haven't glued the pressure chamber because I've seen different air bladders used. Any suggestions?
It's been fun to build for only about $150.00 with the supply pipe (1 1/4" PVC 40)
Thanks a bunch for your information,