Our fresh water tank developed a crack in an easily accessible location. While searching for a fix, I learned that many fresh water tanks are made out of a plastic called polyethylene. This plastic is not easy to patch because nothing adheres to it.
A sure-fire way to fix a polyethylene fresh water tank is to use a plastic welding iron with polyethylene strips. Fortunately, Amazon has a polyethylene welding kit that comes with everything needed.
So far, a month of dry camping and over a 1000 miles later, the patched tank has no leaks. Overall, this method is several hundred dollars cheaper that buying and installing a whole new tank.
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