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Old 11-30-2011, 01:27 PM   #1
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Finding water leaks

We have a slight water leak in our bedroom. It is in the right rear corner of the coach. After it rains the carpet gets a little damp but nothing on the walls. I looked at the exterior joints to look for anything obvious and did not see anything.

Have any of you ever had a pressure test done? I have looked at the company that makes Sealtech.

Did it work with favorable results? Any other leak finding suggestions?

here is a picture of the inside where the leak is. It does not matter if the bedroom slide is in or out.

[IMG]
2004 Winnebago Adventurer 33V by Gene Martel's, on Flickr[/IMG]
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Old 11-30-2011, 01:34 PM   #2
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interesting thought, when i worked in a car dealership, to check for water leaks we would close all windows and doors tight with the hvac fan on high, and soap test the seams, etc.
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Old 11-30-2011, 01:37 PM   #3
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Have you checked around your marker lights in the rear and your ladder mounts? Favorite spots for leaks.
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Old 11-30-2011, 01:54 PM   #4
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^^ Thanks for the hints ^^

We have dried everything out then used a garden hose over the exterior seams in the area, nothing.. So it is a small leak.

It takes a day or two of rain for anything to be noticeable. And what I mean by noticeable is the equivalent of poring a half cup of water on the carpet.

I just don't want a small leak to turn into something bigger and worse over time. Now that we have had the motorhome for a year now the "to do" list is decreasing in size.
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Old 11-30-2011, 02:23 PM   #5
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I work for a USRV, Inc. We have a sealtech machine. Many people have saved time and effort chasing leaks with this system. It all depends on where the leak is opriginating. If it is a gasket on the slide or a roof seam they are easily found with the sealtech. It can be hard to pinpoint if the leak is on an interior seam where the bubbles are not visable. In example the interior A/C gasket. We ony charge a few hundred to do this service, so in my opionion its worth the investment. There is a good chance you can find the leak. In addition, water leaks can sometimes hit race ways in the ceiling. This causes your stain to be way off from your original pioint of intrusion. Hope this advise helps....let me know if you have any fither questions.
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Old 11-30-2011, 02:24 PM   #6
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Thanks! I wonder if that machine can be rented?
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Old 11-30-2011, 03:45 PM   #7
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Make your own with a leaf blower. Put it in the roof vent or make a card board panel to fit in a window. run the leaf blower hose to a hole in this window panel make up a soapy solution and test all seams and windows.
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Old 11-30-2011, 03:57 PM   #8
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im not sure if the leaf blower will work. You need to displace the air at a fast enough rate to cause the amount of pressure needed to blow big enough bubbles to identify your problem areas. You also need to tape off all the exteior comparments around the fridge, water heater, and furnace...etc... The cost to have a dealer do this should only be a few hundred depending on the size of the rig. I am handy and would not do this job myself. You also want to make sure it is done correctly. If you have a large air leak in your setup you wont get proper results from the test. Remeber this isnt the boble of fixes, just a quick method to narrow down the problem area. You difnatley want to address this before freezing tempurates hit. Water gets trapped in the raceway and will expand when frozen. this will create a larger race way and more aggressive leak in the spring thaw. ....do it now while its still a cheap fix. let me know if I can help.
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Old 11-30-2011, 07:06 PM   #9
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Thanks guys. Fortunately I am in the HVAC business so getting ahold of a fan tat can produce .5" of static will not be that hard. Looking at the fan they use in the machine is probably in the neighborhood of 400-500 CFM. Although the CFM is not important it's maintaining the static pressure in the vehicle.

Sure you will have some bigger leaks from the compartment doors but they can be ignored. I would be looking at seams, windows, roof.

Thanks for all of your ideas.. keep them coming.

If I make something I will document for future use.

Now I just thought about a carpet dryer with a rheostat. That would get me the air I need. And I have one at work !!
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Old 11-30-2011, 07:22 PM   #10
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Quote:
Originally Posted by Bug512 View Post
...
If I make something I will document for future use.
...
PLEASE DO!!!!!
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Old 12-01-2011, 08:48 AM   #11
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Sounds like your on the right track Bug....Goodluck. If you need any specs off my seltech machine let me know. Sounds like you are all set though. Oh...I wouldnt worry about the air leaks in the compartments. If anything the only thing I would cover is Floor registers if you have em'. If you have 4" side mounted its probably not worth the trouble unless you cant build enough pressure. Either way...good luck. Let me know if I can help further.
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Old 12-01-2011, 08:56 AM   #12
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Thanks Bill. If you can find out the CFM rating and what pressure they want the test performed at. From the video I saw the manometer read .40" wc

Thanks.
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Old 12-01-2011, 09:09 AM   #13
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I notice you have a slideout right where the leak is. We found many leaks in slideouts where the water came under the angle iron at the top of the slide and ran down the side of the slideout to the floor. Get a mirror and check all across the top of the slide for a break in the sealant.
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Old 12-01-2011, 09:17 AM   #14
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^^ Thanks for that information ^^

I'm sure the leak can be coming from another area and traveling.

I hope to get to look at it this Sunday ..
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