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Re: Water Heater Pop-Off [message #273227 is a reply to message #273195] Fri, 06 March 2015 20:43 Go to previous messageGo to previous message
George Beckman is currently offline  George Beckman   United States
Messages: 1085
Registered: October 2008
Location: Colfax, CA
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[quote title=cbryan wrote on Fri, 06 March 2015 10:10

Thinking about how hot is "too" hot. I wonder if just replacing the Pressure Temperature valve on your rectangular water heater with just a pressure valve and depending on not boiling the water there using your radiator to keep below an estimated say, 220 degrees F at the engine, wouldn't hurt you. And if it did boil, it would vent on the pressure valve as designed. You might have to be extra careful at altitude.

There is a scalding issue with both the engine coolant-heated water heaters at the washroom and shower. I would rather spend money on a thermostatically controlled mixing valve than on the other paraphernalia. There is also a cheap solution where a pair of Tee connections near the shower head between hot and cold with a restriction automatically kept the hot water from scalding. However, at the last dregs of heat from the water heater when boondocking, that mixing would still occur unless manually shut off, which would mean we forget the next time and scald anyway.

Carey

[/quote]

Carey,

We do have a thermostatically controlled mixing valve for the shower. That was the best upgrade I made. Ruth thinks it is the best thing since sliced bread. I will say that after a long day of driving in warm weather the shower was "warmer" that the setting usually delivers. I think the hot water was hot and the "cold" water tank was warmer than usual.

But you are right. That valve is great. A bit pricy but well, well worth it. I am going to plumb it to the bathroom sink as well as sometimes the water gets hot quickly. (My installation did away with the divider valve.)

'74 Eleganza, SE, Howell + EBL
Best Wishes,
George

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