rv2go wrote:
There is a check valve in the hot water line after it leaves the tank. It does go bad. Mine was located right at the tank. Yours may be there or a short distance away. Since I do not winterize, I just remove the small plastic plunger and replaced the case.
If you winterize, you will need to replace the check valve in order to keep from filling the tank.
![](https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSigN6_4UYfkTyz-cxs7oLz2_m-SBegWf5AT2ERVksBvnO31eTV)
Hot out on tank (top)........nipple that is screwed into tank is the check valve.
They are cheap junk..plastic plunger/spring/o-ring assembly. Clog up, jam, o-ring gets dislodged---no hot water can flow out.
You can gut them and just use the nipple
You can replace.........and probably have same issue again
You can gut them and install a shut-off valve on hot out (close when/if winterize) and not have issues anymore