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Old 09-29-2010, 05:56 PM   #21
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In short, get a new tank. It is cheaper in the long run. When you think of the cost over a 10 year period, it ain't so bad.
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Old 10-17-2010, 09:12 PM   #22
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water tank repairs

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Originally Posted by Inland RV Center, In View Post
There are a number of products that can be used that sometimes have success in repairing a cracked water tank.

Depending onh the cracks, and the material used, a fix could be short lived or even last a long time.

The big concern, is to "NOT" used any material that could contaminated the water.

Andy
Andy, what are some of the products used and which one do you recommend?
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Old 10-17-2010, 10:00 PM   #23
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Andy, what are some of the products used and which one do you recommend?
The best fix is melt the plastic back together, being very careful.

Harbor Freight has an inexpensive plastic welding tool.

Epoxy's won't hold.

Hot glue's will usually fail.

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Old 10-18-2010, 07:02 AM   #24
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Quote:
Originally Posted by Inland RV Center, In View Post
The best fix is melt the plastic back together, being very careful.

Harbor Freight has an inexpensive plastic welding tool.

Epoxy's won't hold.

Hot glue's will usually fail.

Andy
I used the plastic welding kit from Harbor Freight and got good results fixing my black water tank. This is the way to go.
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Old 09-26-2011, 06:37 PM   #25
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I ended up using the heat/weld method. Using an old soldering iron and milk bottles as welding rod, I made the repair. The big problem was that as the tank heated up, it wanted to drip inward to toward the inside of the tank. It took some time to do, but it seemed to hold.... for now. Not having a high level of confidence in the repair, I then constructed a drip pan out of left over roof flashing. The thought being that should it leak, the drip pan would contain the leak and prevent items from getting wet. Which is my main worry as the floor and everything else is made of Aluminum.
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Old 09-26-2011, 07:06 PM   #26
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If you decide to weld it back together just be sure to drill a 1/16 hole at either end of the crack before welding or you will find the crack will continue even after you weld it. I welded mine with a hot iron and some polyethylene pellets and its holding great. (knock on plastic!)
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Old 10-22-2011, 10:52 PM   #27
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I have a 77 Argosy that had the same leak, I also used J-B Weld to repair the tank with only a wet rag wipe down. It has lasted for 5 years ...so far.
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Old 10-23-2011, 03:55 PM   #28
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J-B Weld Repair

The key to the J-B Weld repair is oxidation of the polyethylene surface. Epoxy will not stick to new polyethylene. The surface must be oxidized either by age or flame to achieve a bond.
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