Shurflo Revolution 4008 severe hammering
Severe water hammering. Installed the water pump last summer and has worked flawlessly. If a water faucet is fully open, the pump works flawlessly. But there’s a problem when a faucet is turned on a small amount such as to wash hands. Instead of the water pump cycling on/off every 3 seconds or so to maintain pressure, it makes a low tone pulsing/click noise repeatedly very fast and sounds like it’s running on a low low voltage, and shakes side to side incredibly far. Very loud knock knock sound. Hard to explain. But, imagine we needed 25% water flow. Instead of pump simply cycling on and off to provide the flow, it seems to try to turn itself constantly on (never cycling)BUT only at 25% of it ability.
We have 12.8 volts going to it, it’s screwed to floor the same way it’s always been and same the last pump was.
Seems to have started after I drained old water from heater, so I have opened water heater relief, opened hot faucet closest to heater, then tried again, no change. So I re-opened heater relief valve and opened ever faucet and toilet, the closed relief valve at water heater and tried with no noticed difference. So I tried taking air pocket away by leaving water pump switch on and cracking relief valve open at water heater to push air out. No change.
We have no accumulator but have never needed one. Shouldn’t just suddenly need an accumulator, to me something else has changed, cannot figure it out.
Thanks for any suggestions.
We have 12.8 volts going to it, it’s screwed to floor the same way it’s always been and same the last pump was.
Seems to have started after I drained old water from heater, so I have opened water heater relief, opened hot faucet closest to heater, then tried again, no change. So I re-opened heater relief valve and opened ever faucet and toilet, the closed relief valve at water heater and tried with no noticed difference. So I tried taking air pocket away by leaving water pump switch on and cracking relief valve open at water heater to push air out. No change.
We have no accumulator but have never needed one. Shouldn’t just suddenly need an accumulator, to me something else has changed, cannot figure it out.
Thanks for any suggestions.
