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Old 09-04-2016, 07:18 AM   #1
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2017 27' International
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Box Elder , South Dakota
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Bathroom leak somewhere.

2017 International Serenity FB. Fixed a leak under the galley sink using plastic pipe thread tape. Easy. Now something more concerning, a leak in the bathroom! I am probably going to have the dealer look at it. It appears that the water is coming from somewhere underneath the sink/cabinet console. It is clear water and I have tried food coloring in the sink and the toilet bowl to identify the source but to no avail. I am curious what two valves are under the sink so I'll try posting a picture. There is a yellow valve towards the upper right, and a white valve a little to the right of center bottom in the photo. I am connected to city water and have the water pump off. Any help much appreciated.
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Old 09-04-2016, 07:28 AM   #2
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Biloxi , Mississippi
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My last leak was a loose fitting in the sink trap. Was able to hand tighten.


Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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Old 09-04-2016, 07:35 AM   #3
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I'm not familiar with that model but...

There are two things that are not very surprising.

#1 That the food coloring in the sink and toilet, didn't show results. The food coloring would have only showed up in the drain section of your plumbing, which are only gravity drains that aren't under pressure.

#2 That the problem is showing up under higher city water pressure.

I would close each valve individually, to see if the leak goes away. You might be able to pin down and locate where the leak is.

But I agree with Awchief, that the P trap could be the culprit, but it would probably be a slow drip type of leak. A paper towel might be the easiest way to determine that.
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Old 09-04-2016, 02:24 PM   #4
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Turns out there were two fittings that were leaking and all I had to do was tighten them. I identified the culprits by putting paper underneath and then watching where the water fell. A metal nut in the left hand picture, center. And a black multi bladed plastic sort of wing nut in the left photo.Easier than towing to the dealer for repairs. Thanks for all input.
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