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Author:
john5 (VA)
I recently moved into a new house with a partially finished basement. All of the drywall, electric, and plumbing is set up. A bathroom is plumbed in, which I was going to begin tiling until I came across a weird problem with the laundry room, just on the other side of the wall.
I began to notice something strange when I hooked up our washer and used the utility sink in the laundry room in the basement. There is an access panel in the ceiling of the laundry room with a hot and cold water line behind it, both with shut-off valves. If I cut both off, there is no water going to either the sink or the washer hook ups. If I cut just the cold, then both the hot and cold side of the sink and washer bring in hot water. If I cut the hot, then only cold comes in, again to both the hot and cold sides of the sink and washer hook ups. Unfortunately, it is all behind drywall, so I can not say with certainty where this issue is coming from, nor what is causing it. I do however, think the issue is behind the wall in the laundry room and not somewhere else between it and the water heater, which is also in the basement, but on the other side of the house.
The really bizarre thing is if I open both of those shut-off valves in the ceiling, the water gets lukewarm in the basement AND the rest of the house. If just one side is open, the rest of the house is unaffected.
This problem has me quite puzzled and I wanted to ask for some advice before I began chopping out drywall to see if there the hot and cold water lines were crossed.
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Author:
North Carolina Plumber (NC)
There is a direct cross connection between the hot and cold piping somewhere after the shutoff valves. If the tub or shower has a valve roughed in but not trimmed and has a test plug where the cartridge should go, then theres the point of cross over.
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Author:
packy (MA)
sounds like recirculation line problem. i'm guessing someone put a check valve in the wrong location ???
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Author:
john5 (VA)
Great advice, thank you! That is exactly what it was! I just assumed there was a cartridge there separating the lines. I found the cartridge for it however, installed it, and now all of the water is running normally. Thanks again!
Edited 1 times.
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