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Old 08-21-2016, 04:26 PM   #1
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Fleetwood Owners Club
Join Date: Aug 2013
Location: OR
Posts: 29
Think my black water tank is leaking, could use some advice.

So, my wife and I recently purchased a 2007 Prowler travel trailer. It appears to be a well cared for 1 owner unit, but I believe it sat for a period of about 6 months before we purchased it. We have been camping in it with our kids at various places since we purchased it on 23 July. Today when I went outside I noticed a small wet spot under the trailer almost dead center. When looking under I could see it was basically just below the elbow of the main sewer drain. So preparing for the worst I crawled under and proceeded to remove as many of the screws holding the underbelly cover on as I could to try and see what was what. Heres dilemma 1, we are scheduled to leave tomorrow for our next destination so I can't remove to much of the under cover because I need to have it back on and also because I'm in a state campground and they dont like you really doing any work. So I pulled down both sides enough to see that it is actually fairly dry in there. There is a piece of flat stock that is in there that both pieces of the underbelly screw into to form an overlapping seam and it is where it is the most wet. Ive attached some pics below as I can't really see an obvious leak but I'm pretty sure its either the valve or the connecting hose that attaches it to the black tank it self. Any tips on where these are prone to leak at? as well as suggestions on actually accessing it? I don't want to cut the cover up really as we specifically were looking for something with heated tanks and a covered undercarriage as we live in Southern Oregon and it does get below freezing a few times a year here but, both pieces of the cover are about 15' long each and the seam is directly at the leak.

Any help or advice is appreciated, thanks!
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Old 08-21-2016, 04:59 PM   #2
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Gulf Streamers Club
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A lot of times it's in the large drain pipe coming from the tank. The tank can move in a different direction than the gate valve and it's anchor point. Some have remedied this with installing a flexible coupling in the pipe from the tank to the gate valve. For now, empty the tank before travel, keep a dish pan or bucket under the leak and empty it often.

Even if the tank itself is leaking, they can be patched and repaired. Just don't use silicon caulk or nothing else will stick. Find proper materials to patch or weld the plastic.


Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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Old 08-25-2016, 12:09 PM   #3
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advice, leak, tank, water

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