Six and a half feet of tank, eight and a half inches of height: the Ronco Plastics B310 is the B-series at its most extreme - 45 gallons stretched across 78" x 18" x 8.5" to run the full length of a berth flat, a cockpit sole or a van floor. Spaces this shape exist in almost every hull and chassis and almost never get used; this molding is how they become capacity. It ships at 103 lb and holds about 375 lb of water when full, spread thin and low along the structure.
The B310 is dual-purpose - fresh water or gray or black waste, decided by the fittings Ronco installs per order at your marked locations. Across 78" of tank, port placement is everything: the outlet belongs at the true low end of the installed run, the vent at the far high end, and the fill wherever your deck or bay access actually is. Print the drawing below, mark it against your real installation pitch, and let the on-page fitting planner verify the scheme. In fresh service the FDA-grade polyethylene keeps the supply potable.
Ronco Plastics has molded these long-run specials in Tustin, California since 1974. See our boat tanks for the rest of the low-profile family, RV water tanks for the coach equivalents, and the freight cost estimator for delivery to your ZIP. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B310 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.
