Is it possible to frost-proof a grohe anti-scald valve? I was helping a friend put in the plumbing for a vacation cabin. The basement bathroom was put in last fall, and even though the system was drained for winter, the anti-scald valve cracked when it froze over winter. It appears that the way it was designed prevents complete draining.
Am I missing something?
Thanks.
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Replies
leave it open???
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The valve needs to be blown out with compressed air when draining the system.
Or simply put unions all around and remove the valve off-season.
Thanks. I was afraid that there wasn't an "easy" solution. I used unions around the valves (replaced the valves with plain pipe) for pressure testing. I think the valves will end up getting swapped out for the plain pipe permanently, since they will be drywalled in.
Unfortunately, I can't think of a foolproof way to use the air-pressure method - at least foolproof when their kids or friends use the cabin. The way the system is set up now, there are a series of 3-way valves in the basement that drain the various sections of the cabin (upstairs separately from first floor, etc.). Pretty straight forward (make sure no handles point up before you leave). The air pressure would complicate that a lot.
There surely must be other valves available that aren't built like that.