My WW has (2) 50 gal fresh tanks. They are ABS and joined by 1 1/2 (?) hard pipe. I have a leak caused by the 2 tanks being joined by the hard pipe that I fixed with Plasti-mend. The flexing between t...
What about the tubing that is used between the tank and fill spout on the outside of the trailer. Local RV dealer should have some, sells by the foot. It's cheap, it's flexible, not sure if it's 1 1/2, but it's close and worth checking out.