At 102 pounds shipping weight, the RVB428 is among the most substantial 36 gallon fresh water tanks Ronco Plastics offers for RV service. It is a light-duty potable molding meant to carry a rig's main water supply through multi-day stretches without hookups.
The resin is FDA-compliant natural polyethylene, as it must be for drinking water, and the wall stays translucent so the level inside is never a mystery. Rotational molding produces the RVB428 as a single continuous vessel with no seams, joints, or weld lines.
Ronco has molded tanks in Tustin, California since 1974 and finishes every one the same way: fittings installed per order, spin-weld or threaded, located precisely where the customer's specification puts them. The drawing, when shown, depicts the blank before fittings. OneSource Plastics is an authorized Ronco Plastics dealer for the RVB428.