I have an Atwood 10 gal gas/elec water heater that no longer provides hot water. The water in the tank is hot but it is not getting into the hot water line. Initially, I was using the elec side and the water turned cold so I switched to the gas side thinking that the elec element had gone bad. I got hot water but not as hot as it should be. Not even that has gone away. I flushed the tank and the water that came out was too hot to touch. Have I got a one way valve that is inop or is there an air block? Little tough to evaluate since the tank is not easily observable. This is on a 2008 Itasca Horizon.

If you have an outside shower check to make sure the valves are closed.

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.

Have you checked your water heater by pass valve?

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.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 nippleYou can replace.........and probably have same issue againYou can gut them and install a shut-off valve on hot out (close when/if winterize) and not have issues anymore

Another vote for checking the outside shower valves and the bypass behind the unit if it was winterized.

Lack of hot water | Good Sam Community

Ivylog
Explorer III
Feb 27, 2016
Another vote for checking the outside shower valves and the bypass behind the unit if it was winterized.
Old-Biscuit
Explorer III
Feb 27, 2016
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.

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
koda55
Explorer
Feb 27, 2016
Have you checked your water heater by pass valve?
rv2go
Explorer II
Feb 27, 2016
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.
nvlaircrew
Explorer
Feb 27, 2016
If you have an outside shower check to make sure the valves are closed.

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