I was able to narrow down the problem to the check valve while doing my routine water heater flushing.
Rv water heater check valve noise.
Rv hot water problems are an inconvenience so check out these rv hot water heater troubleshooting and parts tips and hints to help you figure out what is going on.
Or get creative if you can t.
More on that in a moment with the new anode installed you are now ready to remove and replace that noisy check valve.
It turns out the rubber o ring had split and the spring was vibrating against the brass casing making a heck of a racket.
Debris can get stuck in the hot water outlet creating a whistling noise.
In this video i locate and replace a faulty brass 1 2 check valve one way valve in the rv water heater output piping.
Most rv water heaters use 1 2 male to male check valves.
But to be safe it might be wise to reinstall one when you get a chance.
Having a check valve at the cold inlet to the heater also prevents mineral deposits and residue from backing into the cold system from inside the water heater.
If you have reduced hot water flow in your rv it might be your check valve.
Parts and tools required for rv water heater service.
No hot water if you have no hot water check to see if the bypass valve is in the correct position.
As long as you flush the water heater out once or twice a year this too shouldn t be a problem.
The valve is designed to let pressured city water enter the rv s plumbing system when hooked to a charged hose bib via your water hose in an rv park and prevent the water pump from pumping water out of your potable water tank onto the ground when not hooked to a charged hose bib.
Inspect yours closely to ensure you find the right replacement part.
If you never winterize your rv this simple fix that takes less than 3 minutes m.