There are two ways to carry 80 gallons on a boat: split it across a pair of tanks and gain redundancy, or carry it in one B458 and gain simplicity - one fill, one vent, one pickup, one level to watch, and no crossover valves to leak. If your hull has one good tank bay instead of two mediocre ones, the single-tank argument usually wins, and this is the molding that makes it.
The B458 is one of Ronco's dual-role marine shells: order fresh-water fittings and it is FDA-compliant potable polyethylene; order it as a holding tank and it runs gray or black waste. Eighty gallons full is about 667 lb, on a blank that ships at 114 lb - frame the bed, spread the load, and keep the mass low.
Every penetration is installed per order at the Tustin, California plant, spin-welded or threaded to your spec, the way Ronco has built tanks since 1974. Print the drawing below, mark it, and finalize in the on-page fitting planner.
Run your ZIP through the freight cost estimator for the LTL lane, and see the alternatives under boat tanks or the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
