OK here is what we did. Added a vacuum relief at the top of the 10" drop pipe. Seems to have resolved the problem. We are adding additional restraints but this looks like it did the trick. Our next stem would have been a silent check valve at pump discharge.
Thanks to all for the help.
See attached sketch. Pipe is open ended at discharge point. Hangers are U-Bolt clamps and clevis types. The piping is moving/banging approx. at the point between the 80' horizontal sections when the pump stops. Thanks for the input thus...
We have installed 30 HP storm pumps with about 500 lineal feet of 6" discharge piping. A check valve is installed in the pit near the pump discharge. The pump lifts the water approx 40 feet along the route (inside and outside of the building) with quite a few offsets. The pipe is hung from a...
We have installed 30 HP storm pumps with about 500 lineal feet of 6" discharge piping. A check valve is installed in the pit near the pump discharge. The pump lifts the water approx 40 feet along the route (inside and outside of the building) with quite a few offsets. The pipe is hung from a...
