LITEPHIL wrote:
...I can tell the tank had been out before since there's a unpainted weld. Anyhow, has any one replaced their under belly tank ? and if so, where did you find one. It looks like a pretty straight forward job, with a small amount of welding on the cross support.
Thanks!
You answered your own question.
Typical RV construction the tanks are dropped in before the floor is installed, the walls are installed over the floor and the roof installed on top of the walls.
Tank is at the very bottom of the entire pile and after the fact removal means you will have to cut and remove the steel cross members that the tank was installed on top of.
There are some specialized plastic tank builders out there that with careful measurements should be able to make you a replacement tank. Pricey and depending on size may require truck shipping.
Here is one that I bookmarked many yrs ago when I was considering a from scratch trailer build..
RONCO-PLASTICS Ended up finding a donor trailer that I rebuilt instead of starting from scratch so I can't attest to how good they are.
You could also try finding someone local to you that does plastic tank repairs. The best way to repair them is using a plastic welding technique. Plastic welding as implied means the plastic is heated then a filler material is added which adds and reinforces the welded areas. Might even wish to consider additional plastic reinforcement around the affected area in case of spider cracks that can't be seen.