I have read several postings here on the subject and am seeking additional information. I too have a pretty severe vibration that lasts 15-20 seconds after the pumps shuts off. I suspect a leaking check valve. I have a brass housing check valve that is mounted horizonally about 10 feet above the pump discharge. The system made some noise but got much worse after I replaced the sewer pump with a new Hydromatic SP-40 that has a pressure diaphram type cut off switch (same type pump as old one). I read here that installing a radiator hose could help isolate the vibration. I plan on replacing the 2 in check vlave with a new "quite-type" rubber flapper check valve. I have the following questions.
1. Should I mount the valve horizonally or in the vertical? (The pump manufacucture said mount it horizonally)
2. Do I need to drill a small 1/8 " hole in the discharge line just above the pump in the sump to prevent air cavatation?
3. Spring vs rubber flapper type valves? ( 1/2 psi required to open)
4. What about magnetic valves? ( a greater 2 psi required to open)
5. Best location for corregated radiator hose isolator?
6. Will putting the pump on a rubber base or feet really help?
7. How do I stop the vibration?
Thanks a Million..........."A big vibration with every flush".....Help
1. Should I mount the valve horizonally or in the vertical? (The pump manufacucture said mount it horizonally)
2. Do I need to drill a small 1/8 " hole in the discharge line just above the pump in the sump to prevent air cavatation?
3. Spring vs rubber flapper type valves? ( 1/2 psi required to open)
4. What about magnetic valves? ( a greater 2 psi required to open)
5. Best location for corregated radiator hose isolator?
6. Will putting the pump on a rubber base or feet really help?
7. How do I stop the vibration?
Thanks a Million..........."A big vibration with every flush".....Help