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shower goes ice cold when someone flushes toilet

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(@rubyw67)
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[#708]

Yesterday morning, I'm enjoying a nice hot shower, shampoo in my hair and everything, when suddenly the water turns freezing cold because someone flushed downstairs. Happens way too often lately... anyone else dealing with this annoying plumbing quirk?


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michellesurfer
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(@michellesurfer)
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Actually, this might be a good opportunity to reconsider your setup... installing a thermostatic mixing valve could help regulate water temperature fluctuations. Had the same issue before, and it's been a reliable fixβ€”plus, saves water by reducing the need to adjust temperatures constantly.


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(@walker32)
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"installing a thermostatic mixing valve could help regulate water temperature fluctuations."

Doesn't that valve run a bit pricey though? Had a similar issue at my old place, and honestly, just tweaking the shower schedule around toilet flushes did the trick for us (mostly). Curious if anyone's found a cheaper workaround... or is this one of those things where you just gotta bite the bullet and invest a bit upfront?


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maggie_gamer
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(@maggie_gamer)
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Thermostatic valves aren't exactly cheap, true, but they're worth it long-term for water savings and comfort. I tried scheduling showers around flushes tooβ€”worked okay until we had guests over or someone forgot the "rules." You could maybe try a low-flow toilet fill valve to reduce cold-water draw... anyone here tried that route? Curious if it actually makes a noticeable difference or just sounds good on paper.


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Posts: 16
(@astrology_river)
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"You could maybe try a low-flow toilet fill valve to reduce cold-water draw... anyone here tried that route?"

I actually gave the low-flow fill valve a shot last yearβ€”figured it couldn't hurt, right? Installation was pretty straightforward (just follow the instructions, don't wing it like I did at first... trust me). It did help a bit, but honestly, the difference wasn't huge. Still got that occasional icy surprise when someone flushed mid-shower. Thermostatic valves ended up being the real hero for us. Worth every penny to avoid those awkward guest explanations!


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