| Re: Water Heater Pop-Off [message #273281 is a reply to message #273059] |
Sat, 07 March 2015 18:38   |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
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cbryan wrote on Wed, 04 March 2015 17:56George,
I can't find that series of posts that recommend putting a Canadian spec pressure-temp valve on the water heater because of the problem you indicate.
Somebody will remember about the Canadian valve. They allow hotter hot water heaters up there.
Best,
Carey
To follow up on replacement valves. I happened to have the bathroom under sink panel out so I looked at the replacement valve I bought in Canada a couple of years ago. On the box it says it is a heat and pressure valve. It has 212F on the box but I could find no pressure listed.
I will say I don't think I am going to put that one in as I often go over the Grapevine and usually one trip East a year, over the Rockies. It is not unusual to see 220 and even 230 (once) when pulling a long hill in warm weather. The coach does not boil but of course antifreeze and the (albeit low) pressure pressure cap hold things in check.
But, tell that to a 212 pop-off in a tank where over 212 boils.
In addition to the stock restrictor, I am beginning to think I need a thermal valve on the engine water return from the water heater that would shut off at 212. Is there such a thing?
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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