If you can access the back of the water heater ... put your hand on the upper-most fitting while someone opens a faucet. There is a check-valve in this fitting. Vibrations or "Hums" are usually caused in valves ... this one and the bypass valve are the only ones that affect hot water only. Check to see if bypass valve is full open. Hope this helps, Hank
__________________
Hank & Lynn
2007 Cougar 290RKS, E-Z Flex, 16" XPS RIBs ( SOLD .. Gonna miss her ... looking for new 5r)
2004.5 Dodge 2500 QC, LB, 5.9HO, WestTach gauges, Ride-Rite
|