When I once worked at a RV dealership, they had a special epoxy compound that could be used to repair plastic holding tanks. It's also my understanding that the holding tanks are supported by a flange on the tank. The straps under the tank are only there to hold the tank in position during the trailer assembly process.
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2014 Jayco Jay Flight 33RLDS travel trailer, now seasonal in the Adirondacks, Honda EU3000 generator.
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