Design Flaw in Fresh Water Pickup Line New Trailer

I would look at the situation of removing the under belly covering as an opportunity. An opportunity to observe how plumbing, wires, and insulation is installed at the factory and if any improvement can be made. This would also allow you to correctly locate the tank output fitting to the desired location.

There is nothing harmful about removing the belly cover and many Forum members have done it, both to access a problem or improve the poor workmanship of the factory.