We're in the Denver burbs at about 5800 feet, which contributes to this. ( water boils at around 203 degrees here )
This is the second time in 2 years I need to replace this valve and I'm tired of it. Why?
We have a Aprilaire whole house humidifier that requires a 1/4" line of regulated temp 140 degree water from the top of the water heater. When it runs, it causes "stacking", where the trickle of hot water from the top causes a trickle of cold coming in the bottom, and the gas flame to come on to heat it, overheating the top.
I just replaced this overflow valve, 2 years ago if I recall. I think they said it turns on at around 170 degrees?
Right now it's dripping in the pan, and someone who was in the crawl space just told me there's a puddle down there now.
We can't afford extravagant heroic solutions to this, like a circulating loop for the hot water, or all that. We're barely paying the bills here.
( This is a modular house and we'd love to do the loop thing, but there's insulation and plastic over the whole bottom down there. )
So do they make valves like this that are a higher temperature? Like maybe 190 degrees?