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Old 03-01-2009, 11:30 AM   #1
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Strange Water Leak

We have been down in the Rio Grande Valley for over two months and all has been fine except for a strange wet spot appearing in the bedroom carpeting about a month ago. Couldn't find where it might have come from but didn't worry too much because it dried up and disappeared. Well 10 days later the wet spot was back. Now I'm more curious. What could cause a wet spot every ten days or so. I drain the black tank on about that schedule and I have a factory installed sprayer built in to help clean the tank. Next time I drained the tank I didn't use the sprayer and lo and behold no more wet spot. It appears that somewhere in the bowels of the tank area I have a problem:
a. the hose has a leak
b. hose connection to black tank is loose and leaking.
c. the black tank has a crack on top somewhere.
Took some of the belly cover off but unable to see where the leak might be.
At this point I am waiting until I get home in April to drop the belly cover and look for the leak. In the meantime I am using my flushking instead of the built in tank sprayer and haven't had a reocurrence of the wet spot.

If anyone has any thoughts on this problem I would appreciate hearing from you.
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Old 03-01-2009, 02:05 PM   #2
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Do you own a dog?

Just kidding, I think you are on the right track, Test your theory by using your tank flush system and see if the spot appears, have your wife watch the area while you do it.
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Old 03-01-2009, 03:12 PM   #3
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Quote:
Originally Posted by NWJeeper View Post
Do you own a dog?

Just kidding, I think you are on the right track, Test your theory by using your tank flush system and see if the spot appears, have your wife watch the area while you do it.
Better yet, have the dealer watch the area if you are still in warranty.
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Old 03-02-2009, 08:06 AM   #4
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Quote:
Originally Posted by jjmoore View Post
Next time I drained the tank I didn't use the sprayer and lo and behold no more wet spot. It appears that somewhere in the bowels of the tank area I have a problem:....

...In the meantime I am using my flushking instead of the built in tank sprayer and haven't had a reocurrence of the wet spot.
That almost rules out the black tank as the problem. My guess is that it's either the hose clamp(s) on the flush system is/are loose, the hose on the flush system has a crack or the anti-syphon valve on the back flush is leaking and spraying water out.
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Old 03-03-2009, 08:28 PM   #5
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So much for my trouble shooting skills.

The "wet spot" was dry for two weeks. Haven't used the factory installed black tank sprayer. Well the "wet spot" showed up the day before yesterday. Was damp for about 12 hours and now has dried up again. I now have no clue. The spot is right along the seam between the vinyl floor in the kitchen and hallway and the carpet in the bedroom. It is located between the shower and the vanity sink. I have put dry paper towels around and under all the pipes in the vanity and no sign of any drips or leaks. Their is six inches of vinyl between the shower basin and the carpet. This area has no signs of any dampness after use. I am totally flabbergasted. May have to wait until I get home in April and do some deasembly of walls to see where the moisture is coming from. There has been no precipitation so I have ruled out a roof leak.
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Old 03-03-2009, 08:36 PM   #6
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can you possibly post a picture and maybe a floorplan layout.
I am confused BIG time
are your tanks directly under the wet spot area?
when my grey(shower) tank gets over fulllllll it will drip on the other side of the rv .
this is a curious item you have here
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Old 03-04-2009, 10:16 PM   #7
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Here is a picture of the wetspot. It is clearly visible because the moisture has caused the plywood below to lightly stain the carpet. We will clean it when the leak is discovered and fixed. Currently it is dry. The shower is to the right. The lavatory sink is to the left and the wall to the left is the enclosure around the commode. If the leak were from the shower I would expect to see moisture on the floor between the carpeting and the shower enclosure but it is always dry. I would appreciate any thoughts you might have. The spot is actually right above where the grey tank sits. The black tank sits in front of it (above in the picture).
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Old 03-05-2009, 05:17 AM   #8
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Remove the floor vent and look down in side if you need to use an inspection mirror to make sure the duct work is intact. Strange things have happen, there could be a cold spot in that area of the floor and when the heat comes on it my be condensation on the bottom of the of the plywood. If so then more insulation will need to be added.....Just a thought, good luck.
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Old 03-05-2009, 06:48 AM   #9
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What make this, to me, even crazier is that the vinyl extends under the carpeting. So for the moisture to be coming from underneath it would have to penetrate the vinyl first. FWIW, I had a similar problem once in the same location, relative to my floor plan. The culprit was the connections of the water lines to the outside shower not being screwed on tightly at the faucet end. Water would intermittently drip down the pipes inside the wall and out onto the floor, then flow across the floor. One other thought- I once had a factory idiot put a trim screw through a water line, causing it to leak. I'm looking at the screws in your vent cover as I say that.
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Old 03-05-2009, 12:19 PM   #10
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"Wet spots" are not always a bad thing...

...OK, I'm sorry...
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