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Old 07-26-2017, 08:21 PM   #1
Ert686
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2004 keystone cougar fresh water tank

Help please! I recently purchased a 2004 cougar fifth wheel the 245EFS model. The fresh water holding tank has a leak. Anyone know if the tank is abs or poly? I need to know before i start repairs to it.....thanks in advance
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Old 07-26-2017, 08:31 PM   #2
chuckster57
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Welcome to the forum.

Fresh tanks are usually made from the same material as milk jugs. Repair can be difficult at best we have found in our shop.
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Old 07-26-2017, 08:44 PM   #3
Ert686
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Yes it is almost exactly like a milk jug but 45 gallon size! I was just wondering if it was poly material or abs. If its abs the repair kits with epoxy should work. I cant afford a new tank right now so hoping to repair it to get me through the season.
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Old 07-26-2017, 09:24 PM   #4
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It's not ABS that I'm aware of.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.

Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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Old 07-27-2017, 02:19 PM   #5
Ert686
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Lol, crawled under there today and started taking the black hard plastic belly pan off so i could get to the tank. Thought i was gonna be able to drop the tank but after inspecting, it looks like the installed the damn thing from above before the floor was put in! It cant be removed from below without cutting on the frame. It sits right between 2 C channel cross members that are welded in. No room to even move it if i could......DAMN!! Im gonna try to plastic weld it from underneath but its going to be tough....
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Old 07-29-2017, 02:50 PM   #6
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Chuckster, i took a milk jug and cut it into strips. Held it on the tank from underneath with a metal putty knife. I then melted it onto the tank with my heat gun. This sealed up the holes but still dripped when i filled the tank. So i bought a can of bondo fiberglass jelly with a tube of hardener and some fiberglass cloth. I mixed it as directed after rough sanding the tank and spread it on about 4 inches past the hole. Put the fiberglass in and pushed it into the jelly mix and spread it as smooth as i could because it hardened fast. It stuck very well to the tank and i let it sit overnight to cure. Filled the tank today and it appears to be holding good. No leaks. FYI......
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Old 07-29-2017, 02:58 PM   #7
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Good deal!! Most often there will be one cross member welded and the other will be secured with self tappping screws.
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Old 07-30-2017, 05:48 AM   #8
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Just a little added info - on our 2012 Cougar, the support straps for the FW tank are attached to the cross members with hex head self-drilling/tapping screws that were installed from the top down. The edges of the FW tank rested on top of these screw heads and the screws had begun to wear holes into the plastic.
While the tank was empty, I was able to slip some galvanized sheet metal (about 26 ga) between the tank and the bolt heads. Taped the sheet metal strips to the tank with good ole' Gorilla Tape.
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Old 07-30-2017, 06:50 AM   #9
Ert686
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Yes. With mine, i am unable to remove the tank from underneath without cutting a cross beam that is welded across from one frame to the other. Almost across the center of the tank. There are self tapping screws on one side of the strap but with this tube welded across there is no way to remove the tank. I just layed underneath of it and repaired it from the bottom. It was a real pain in the a.. but i got it done.
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