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Water Under Kitchen Sink
Periodically I get water under my kitchen sink and I can't figure out
why. (Actually, I can figure out where *some* of it has been coming from: The valve for the hot water supply line had a small link. That has been replaced and I'm confident that is no longer a source. However.....) After fixing that valve I *sometimes* get some water. A few other details: 1. Plumbing: I have three traps under the sink. One is on the disposer. The 2nd is for the non-disposer side of the sink. The third is for the dishwasher drain. 2. Dishwasher Plumbing: My dishwasher is plumbed in the loop-dishwasher-drain-high-under-sink and put it into a vertical PVC pipe into it's own trap. This trap is downstream of the two sink traps. (The sink traps go into a 'y', and dishwasher trap then enters through another 'y'.) Yesterday I watched VERY carefully while the dishwasher was going through a cycle to see if anything was coming out of that drain. Nothing. Totally dry. My next theory is that, if the situation is right, using the disposer causes some sort of pressure in the line that causes trap watter to be pushed up through the vertical dishwasher PVC. (By the way, after the second 'y' the pipe is horizontal for probably 2-4 feet before it drops to the basement.) So if there is debris in that horizontal section, could the path of least resistance be up the dishwasher drain, rather than down the drain? Is it better to drain the dishwasher into the disposer like I've seen discussed? Thanks. Jim |
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