Ronco Marine Holding Tanks

The Ronco Plastics B508 closes out this run of the B-series with 60 gallons in a 48 x 25 x 13 inch profile, a big-capacity tank that still ducks under a bunk. Thirteen inches of height is the...

Sixty gallons laid out 55 inches long, 20 wide, and 14 tall: the B543 is shaped like a chassis rail run because that is where it usually lives. RV underfloors, the tunnel beside a boat's engine bed,...

Buy the 7W for one job and it will do either. This 35-gallon molding is Ronco's dual-role blank: plumbed with fresh-water fittings it serves as a supply tank, plumbed for drainage it becomes a gray...

The Ronco Plastics B472 is a 54 gallon commitment to flexibility. Molded as a blank B-series shell, it leaves the Tustin, California plant as either a fresh water tank or a waste holding tank, and...

A 26 inch cube. The B434 holds 69 gallons in a shape with the smallest possible footprint for its volume - 26 x 26 x 26 inches of tank that drops into a square bay, a cockpit locker, or the corner of...

The B538 is the stretched version of Ronco's compact near-cube marine tank: same 22-inch width, same 20-inch height, drawn out to 26 inches long for 45 gallons. If you measured a compartment for the...

The Ronco Plastics B487 is a wide, shallow 97 gallon molding built for the space under things: under a deck, under a coach floor, under a garage-bay platform. Its long, flat proportions distribute...

The Ronco Plastics B391 is nearly eight feet of tank: 95 x 33 x 9 inches, 110 gallons, molded as a single low-profile slab for the long underfloor voids of large boats and coaches. Ronco names it a...

The B328 is the biggest dual-role molding in this slice of the B-series: 115 gallons in a 39.5 x 28 x 26 inch block. Twenty-six inches of height is unusual for a marine tank - most of the line...

The B530 is the big one: 98 gallons, 44 x 25 x 23 inches, the largest marine molding on this page of Ronco's book. This is passagemaker and live-aboard capacity - or, run as a holding tank, the...

The RVB433 is a dual-role molding: one large-capacity B-series tank that Ronco configures either as a fresh water tank or as a gray or black waste holding tank, depending entirely on the fittings you...