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 s...
Forum Discussion
Shurflo 4008 is a Bypass Pump....uses an internal bypass diaphragm that is designed to control low demand cycling
No accumulator tank required
A few suggestions:
*Check the pump inlet strainer ...clean and doesn't suck air (bad o-ring)
*Check the pump head screws....tight/not fallen out
*Water Heater Air Pocket.....there to minimize pressure increases due to water swelling in volume when heated
(turn water source off....open faucet/relieve system pressure....HOLD open T&P Relief Valve until water stops flowing out---let it SNAP closed....turn on water source/close faucet---Air Pocket established in top of WH Tank)
Now as to that hard hammering....
Try the Down/Dirty Adjustments on pump Pressure Switch AND Bypass setting
Shurflo 4008 Down/Dirty Adjustments
No accumulator tank required
A few suggestions:
*Check the pump inlet strainer ...clean and doesn't suck air (bad o-ring)
*Check the pump head screws....tight/not fallen out
*Water Heater Air Pocket.....there to minimize pressure increases due to water swelling in volume when heated
(turn water source off....open faucet/relieve system pressure....HOLD open T&P Relief Valve until water stops flowing out---let it SNAP closed....turn on water source/close faucet---Air Pocket established in top of WH Tank)
Now as to that hard hammering....
Try the Down/Dirty Adjustments on pump Pressure Switch AND Bypass setting
Shurflo 4008 Down/Dirty Adjustments
