NO hot water pressure

[werni9]

Hooked back up to city water and good cold water pressure. No hot water pressure from any faucet. After an hour of not opening any faucet, I can then open and get a medium burst of water and then a trickle to nothing. Water does not have to be HOT to come out of hot water heater does it? Drained out white calcium chunks and some sand debris when I flushed it. Drain system and use a blow out plug? Where is the HW outlet valve. It may be blocked. HELP.

[Beverley_Ken]

x3 on the outlet check valve. Excellent description and pictures Old-Biscuit.

Beverley and Ken

[calamus]

X2 What Biscut said there is a valve open letting it bypass.

[Old-Biscuit]

On the backside of water heater is where valving is located (inside RV)

Sounds like check valve on hot outlet is plugged/failing.
The check valve is inside the nipple that is screwed into tank (top line)
They are cheap plastic plunger/spring/o-ring assembly.....plugged due to scale/debris or o-ring is out of position.

Check that you have water/getting in WH tank.
Turn off water supply
Pop open the PRV via lever (outside compartment)
Water should drain out if tank is filling (eliminates problem with cold inlet valve being the problem) You can turn on water supply with PRV open to check that water is flowing into tank.
If it is...then check valve bad. They are junk to begin with.

Some folks just remove internals and install a shut-off valve in hot outlet line
Check valve is just to stop back flow into tank when bypassing water heater

[DrTanTodd]

Did you check your valves to determine that the valves are not closed for winterization?