Rectangular Tanks

The B189 is one molding with two careers. Ronco lists it as a 30 gallon marine water or waste holding tank, and the "or" is literal: the blank shell leaves Tustin with no fittings at all, and what...

The B207 is a 22 gallon marine fresh water tank that ships at 30 lb, and the ratio between those two numbers is why polyethylene won the tankage argument. You get a genuinely useful cruising supply -...

The B225 is a 22.5 x 22.5 inch square, 12 inches deep, holding 25 gallons - a footprint with no long axis, which is rarer and more useful than it sounds. Corner voids, square hatched compartments,...

The B250 is nearly square in plan - 23.5 x 23 x 12 inches - which makes it the tank for the bay that is wide and short rather than long and narrow. Twenty-five gallons ride in a footprint under two...

The Ronco Plastics B281 packs 21 gallons into a near-cube - 19.88" x 16.88" x 16.38" - which is the most efficient way to get real capacity through a small locker opening. Cubes waste the least wall...

Shaped like a beam and installed like one: the Ronco Plastics B316 is a 69" x 11" x 11" square-section tube of a tank that lays 32 gallons along a keel line, a frame rail, or the dead corridor beside...

The B332 is the light-and-simple way to put 26 gallons of water aboard. At 28 lb empty it is a one-person install - up a companionway, through a locker hatch, into position without rigging a lifting...

Ronco molds 26 gallons three different ways, and the B338 is the middle path: 39 lb of polyethylene, heavier-walled than the light blank, without the full armor of the heavy-service shell. That...

Thirty-four gallons, nine and a half inches tall: the Ronco Plastics B381 is a 34 x 26 x 9.5 inch B-series molding for underfloor installs that still want real capacity. It ships at a modest 35 lb,...

Twenty-one gallons, 83 lb of molding: the Ronco Plastics B396 packs an unusual amount of wall into a mid-small B-series tank. This is the shell you choose when the tank will live somewhere punishing,...

Small boats give up tankage last, and a 13 gallon shell like the B419 is often the compromise that works: enough fresh water for a weekend aboard a trailer sailer or enough holding capacity to make a...

Six inches tall. That is the whole story of the B425: a 25 gallon capacity flattened into a 36 x 32 x 6 inch pancake that disappears under floors no other tank format can use. Underfloor voids in...