Eighty gallons is boondocking range. The B327 is one of the big fresh water moldings in the B-series, a 48 x 24 x 18 inch block sized for RVs and coaches that want to stay out longer than a weekend. Run the math that matters: 80 gallons at 8.34 lb per gallon means about 667 lb of water riding in your rig when it is topped off. That number should drive two decisions - where in the chassis it sits, and what supports it. Mount it low, mount it near the axles, and give the bottom full-length bearing.
As a B-series blank it is technically dual-role, but this shape earns its keep on the fresh side: FDA-compliant polyethylene, molded for potable water storage. Ronco has been rotomolding water tanks in Tustin, California since 1974, and every tank leaves the plant with fittings spin-welded or thread-installed to the customer's marks. Print the drawing below, use the fitting planner on this page to place your fill, vent, outlet, and level sender, and the tank arrives ready to plumb.
At 109 lb empty and four feet long, it is a two-person carry and worth a freight sanity check - the freight cost estimator quotes your ZIP in seconds. Compare it against the other large fresh moldings in RV water tanks, or if this is going in a hull, start from boat tanks. The full range is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B327 dimensional drawing - print it to plan your install and mark exactly where you want fittings located; Ronco installs spin-weld or threaded fittings to your marked spec.
