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Pumps, Wells, Tanks, Controls / Water Hammer

« on: December 12, 2012, 07:11:33 AM »

I have a submerged well pump and well troll pressure holding tank.  I also have a sediment filter that is just downstream of the blue pressure tank.  I have a problem with water hammer when the well pump kicks on.  Sounds like someone in the basement is hitting the wall with a sledgehammer.  The problem seems to occur after I clean the sediment filter.  I have to close two plastic screw type shut off valves to allow me to open the sediment filter to clean the cartridge.  I also open another valve which bypasses the sediment filter.  The cheap valves don't fully close so I  put a bucket under the sediment filter to catch water that trickles  out of the sediment filter housing.  I always seem to get air in my pipes from this periodic filter cleaning.  I think this is the source of my water hammer.  Yesterday I turned my well pump off and took the water pressure to zero.  I opened the drain on the blue tank to fully empty it.  I then turned the switch on for the submerged well pump and now it seems like the water hammer is resolving.  I checked the pressure on my blue tank and it was 28.  My tank is set 30 to 56 psi.  I've read your posts on check valves.  I have one that is built into the manifold just as the water line exits the blue tank.  Also one submerged I assume.  Would replacing my cheap plastic screw valves with better ball valves fix the problem and avoid air in the system when cleaning the sediment filter?  Should I remove the check valve connected near my pressure switch on the blue tank?  Thanks