Hot water

malexander wrote:



I didn't change the t-stat. We don't have anybody that uses it but us. We know the water is going to be hot, so we all plan for it. We start the cold water first and adjust the temp we want with hot.

Hope ALL Guests are so informed.....hate to see someone scalded.
Burns are so painful especially when they can be avoided.

Old-Biscuit wrote:

malexander wrote:

Old-Biscuit wrote:
As suggested .....
Check Valve in Hot outlet on WH Tank (Top Fitting) is clogged/failed

No mixing valve or you would get cold water flow when hot clogged

I would get the flow to the trickle then nothing. It WAS the mixing valve. Enough water would trickle through to pressure up when the faucet handle was turned off. Then when turned of it would run a stream down to nothing. Mixing valve was stopped up. I did all the repiping myself, removing the valve. Haven't had one iota of a problem since.

That's unusual.....
HOT is side that normally clogs up from scale/calcium in WH Tank
and the COLD will continue to flow thru mixing valve


Now that you have removed the mixing valve did you change out the 'T-stat' to Atwood standard one?
XT Model uses a 160*F t-stat---mixing valve controls hot out to 130*F
W/O Mixing valve you Hot water that can SCALD instantaneously
Standard Atwood t-stat (140*F) can replace the XT t-stat...same size/installation just need to change out Pin connector for a small spade connector on Brown Wire.

I didn't change the t-stat. We don't have anybody that uses it but us. We know the water is going to be hot, so we all plan for it. We start the cold water first and adjust the temp we want with hot.

malexander wrote:

Old-Biscuit wrote:
As suggested .....
Check Valve in Hot outlet on WH Tank (Top Fitting) is clogged/failed

No mixing valve or you would get cold water flow when hot clogged

I would get the flow to the trickle then nothing. It WAS the mixing valve. Enough water would trickle through to pressure up when the faucet handle was turned off. Then when turned of it would run a stream down to nothing. Mixing valve was stopped up. I did all the repiping myself, removing the valve. Haven't had one iota of a problem since.

That's unusual.....
HOT is side that normally clogs up from scale/calcium in WH Tank
and the COLD will continue to flow thru mixing valve


Now that you have removed the mixing valve did you change out the 'T-stat' to Atwood standard one?
XT Model uses a 160*F t-stat---mixing valve controls hot out to 130*F
W/O Mixing valve you Hot water that can SCALD instantaneously
Standard Atwood t-stat (140*F) can replace the XT t-stat...same size/installation just need to change out Pin connector for a small spade connector on Brown Wire.

Old-Biscuit wrote:
As suggested .....
Check Valve in Hot outlet on WH Tank (Top Fitting) is clogged/failed

No mixing valve or you would get cold water flow when hot clogged

I would get the flow to the trickle then nothing. It WAS the mixing valve. Enough water would trickle through to pressure up when the faucet handle was turned off. Then when turned of it would run a stream down to nothing. Mixing valve was stopped up. I did all the repiping myself, removing the valve. Haven't had one iota of a problem since.

Thanks for the reply, i got it working by tapping and cycling the bypass valve while my wife turned on the hot water.! SUCCESS!!

As suggested .....
Check Valve in Hot outlet on WH Tank (Top Fitting) is clogged/failed

No mixing valve or you would get cold water flow when hot clogged

You said "Cycled the bypass valve" Not Valves like I have but Valve .. singular.

This leads me to ASSUME you have a single valve bypass system. If the assumption is wrong you may go to the next reply now.

Single valve systems are not really single valve. There is one 3-way MANUAL valve in the COLD water line to the heater and a CHECK VALVE at the hot water outlet (may be one on the cold inlet as well but that's .. No readon for it)

The check valve can "lime up" or crud up if you like, and not open thus not allowing hot water out of the tank into the plumbing.

If possible remove it (it just screws in) and replace it or better yet replace it with a quarter turn valve. If you can not remove it .. Gut it (needle nose pliars and pull out whatever is inside it) be sure to label things so that anyone Winterizing knwos that vave is different now.

Yes, mixing valve. Hard water deposits clogging up the valve itself because of dumb little metal screen on it. Instead of re-plumbing around it, I just make sure to run vinegar thru the lines every 6 months or a year.

I Had the same issue. It turned out to be the mixing valve. I removed the valve and replumbed around it.

Also check your outside shower and make sure both hot and cold are shut.