Sammyhydro11
In the Trades
Well thank god for Republicans!
Contrary to popular belief, most if not all submersible pumps below 1.5hp come with either a built in or external check valve. All are spring loaded to prevent water hammer. Otherwise you had might just as well install a swing check that could hammer your pipes to death. The idea of the spring is to keep the valve as near to close as possible. As a submersible pump builds pressure, it's volume decreases which let's the spring close the poppet in the valve more. Once the pump shuts off, the valve is nearly closed and closes the rest of the way quietly. Water hammer in submersible pump systems is a rare thing and in most instances is caused by other things rather than the check valve. And like someone mentioned earlier, this noise could be a pipe rattling that is not properly fastened.This is getting to be a pretty long thread...I am stupid about wells...but just thinking about a logical explanation...and have not read all of the posts... if the well is 398'..that means you got a heck of alot of pressure going toward the well when the pump shuts off...which tells me that a check valve is slamming shut and probablly need some kind of a heck of a muffler or shock absorber to lessen that hammer effect. May the force be with you....
Yes i have a meter
The problem with the water-back-down the well test, is if there is a check valve at the pump, and a second further up the shaft, then if you believe Franklin who is providing the information to save their motors, if the botton one leaks, it will put a vaccuum that will cause the hammer at start up.Raucina said:If you perform the water -back- down- the well test as earlier described and the pump checkvalve is not leaking, then do not pull the pump.
This is awkward, but...
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