Ronco Marine Holding Tanks

Six inches. That is the whole vertical story of the B235, and it is the reason this tank exists: 18 gallons spread across a 40.75 x 18 x 6 inch pancake that slides under a berth, a cockpit sole, or...

The B257 packs 20 gallons into an 18.5 x 18 x 16 inch near-cube - the most compact way Ronco molds this capacity. Where its slimmer siblings trade length for a low profile, this one trades nothing...

Twenty-two gallons is more than a day tank and less than a cruiser tank - the capacity for the boat or camper that goes out for a long weekend and hates rationing. The B276 carries it in a 23 x 16.88...

The B366 rounds out the B-series small-tank bench with 18 gallons in a 22 x 17 x 12 inch molding - compact in plan, moderate in height, the proportions of a tank that was designed to fit real lockers...

Nineteen gallons in 27 x 15.25 x 12 inches: the B549 sits in the gap between the small day-boat tanks and the serious cruising sizes, which makes it the natural upgrade when a boat's original tank...

Eighteen gallons, two possible lives. The Ronco Plastics B166 is molded in Ronco's marine water / waste series, which means the same shell ships as whichever tank you order: with potable fittings it...

The Ronco Plastics B184 is 25 gallons of deliberate ambiguity: a marine water / waste series molding that becomes whichever tank your boat is missing. Order it with potable fittings and it is a fresh...

The Ronco Plastics B187 is a 20 gallon molding from Ronco's marine water / waste series, which means the question is not what it is but what you need it to be. Specify potable fittings and it ships...

The B526 gives you 16 gallons in 26 x 14 x 11 inches - weekender scale. It is the size that covers two people and two days on the hook without surrendering a whole locker, and at 19 lb empty it goes...

The Ronco Plastics B408 is a tidy 25 gallon rectangle, 32 x 22 x 10 inches, one of the most versatile shapes in the B-series: shallow enough for underfloor bays, compact enough for lockers, big...

The Ronco Plastics B163 is 25 gallons kept deliberately low: 30 x 20 x 10 inches, a footprint that slips under bunks, cockpit soles, and camper floors where every vertical inch is contested. It comes...

Eight inches of height is all the Ronco Plastics B378 asks. This 23 gallon B-series molding spreads its capacity across a 40 x 18 x 8 inch pancake profile, sliding under floors, berths, and dinette...