I have a 1.1 acre, 2.9 million gallon pond. I need to repair a submerged pipe and valve, 2-3 feet below surface. The pond level won't naturally lower until Fall. There is no provision to drain it. I need to do this repair before spring.
I have a Honda gas operated water pump. It uses about a 3" inlet and 3" outlet. But that seems puny given the pond size?
Or, I might be able to rig up some flex hose or 4 or 6" PVC, and prime a suction from out of the pond? I'm hoping I can time this between storms this winter, so rain is not filling it as I am draining it.
Any ideas? I've never tried to do anything like this!