Ronco Marine Holding Tanks

Long, narrow, and shallow - 27" x 10.25" x 6.5" - the Ronco Plastics B287 is shaped for the spaces boats and campers actually have left over: along a gunwale, under a bench seat, beside a wheel well...

Six gallons, 20 x 11.5 x 7 inches, 11 lb empty: the B357 is the smallest dual-role molding on this page, and small is precisely its job. This is the tank for the boat or van system that bigger tanks...

Ten gallons, six pounds. The B100 is the smallest kind of marine tank Ronco molds - a dual-role blank that becomes either a fresh water tank or a waste holding tank depending on the fittings you...

At 5.75 inches, the B272 is one of the shallowest tanks Ronco molds - 7 gallons stretched across a 24.25 x 12.5 x 5.75 inch wafer that fits where even its low-profile siblings cannot. Under a false...

The B441 is a 12 gallon near-cube - 14.75 x 14.75 x 14.25 inches - which makes it one of the most position-flexible small tanks Ronco molds. A footprint barely more than a square foot slots into...

Eight gallons, 18 x 11.5 x 10 inches, 12 lb on the scale - the Ronco Plastics B186 is the smallest kind of serious: a real molded tank for spaces where most builders would give up and strap in a jug...

Ten gallons, 15.38 x 13.25 x 13.25 inches, 14 lb: the B263 is the tank for boats and campers where every cubic inch is contested. Its square cross-section - equal width and height - means it sits...

Under seven inches tall and two feet long, the B270 slides 8 gallons into spaces most people write off as trim voids: 24 x 12.25 x 6.88 inches of low, flat molding for under a step, beneath a berth's...

Nine gallons in a shoebox: the Ronco Plastics B321 measures 18" x 12.5" x 11", a marine molding compact enough to claim the last odd corner of a console, cuddy or camper cabinet. It is a dual-purpose...

The B358 fits 9 gallons into 19.5 x 14 x 8 inches - shoebox proportions that make it one of the most placeable tanks Ronco molds. Eight inches of height slips under dinette seats and berth flats; the...

The B360 is a tank shaped like a duffel bag: 23.5 inches long, 10 wide, 8.5 tall, 8 gallons. That slim rectangular section is made for the gaps every build has and no catalog anticipates - along a...

The B361 stretches 9 gallons along a 25.5 x 10.5 x 8.5 inch molding - a longer, narrower take on the small-tank problem than its shoebox siblings. The extra length is the useful part: it rides flat...