Twenty gallons is the honest minimum for a boat you sleep on - enough for two people to cook, clean, and drink for a weekend without counting cups. The B349 delivers it as a 28 lb bare marine blank, a size-to-weight combination that slots into the awkward middle ground where a tank must be substantial but still fit through the hatch it will live behind. It is the kind of tank that gets bought twice: once for the port locker, then again for the starboard one when the first proves out.
Ronco ships it without fittings and installs yours to order - spin-welded or thread-installed at the marks you set on the printable drawing below. The fitting planner on this page turns port placement into a five-minute exercise, and the plant in Tustin, California has been executing customer drawings since 1974. In fresh service the polyethylene is FDA-compliant and safe for potable water; and because every B-series blank is dual-role, waste fittings convert the same shell into a 20-gallon gray or black holding tank.
Budget about 167 lb for the filled tank when you size bearers and straps. If the proportions do not suit your space, nearby capacities and different shapes fill the boat tank category; trailer and van builders should scan RV water tanks; and the entire line is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B349 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.
