Ronco Plastics

At 12 lb out of the mold, the 49H is one of the lightest ways to add 11 gallons of holding capacity to a coach - light enough that one person can dry-fit it overhead in a bay without a helper. That...

The 4H solves a specific plumbing problem: a 35-gallon waste tank that dumps out the side instead of the end. On coaches where the termination valve sits outboard of the frame rail, a side-dump...

Sixteen inches wide, twelve and three-quarters deep: the 52H is the narrow-and-deep answer in Ronco's 33 gallon class, a 46 x 16 x 12.75 inch molding for the slot between a frame rail and a holding...

Where most 22 gallon holding tanks spread out, the 53H digs down: 30 x 22 inches of footprint and a full 13.5 inches of depth, the deepest shape in Ronco's 22 gallon family. That geometry suits...

Twenty-six gallons in a 28-inch-long package: the 54H is the space-efficient member of its size class, a 28 x 22 x 11.5 inch box that fits compartments too short for the sprawling shapes. The blank...

The 55H buys its 39 gallons with floor area instead of depth: 49 inches long, 24 wide, 10 tall. That low-slung geometry keeps a full waste load - roughly 325 lb of gray or black water - riding close...

A 22 x 22 inch footprint makes the 56H the square peg of Ronco's holding tank line, and sometimes a square hole is exactly what you have. Twelve inches deep, 21 gallons, with the dump outlet...

The 57H solves the corridor problem: 16 gallons of holding capacity in a 63 x 10 x 8 inch run, a tank shaped like the space beside a driveshaft or along the outboard side of a frame rail. Ten inches...

On paper the 58H and its sibling are twins - both 16-gallon holding tanks, both 63 x 10 x 8 inches, both 19 lb blanks. The difference lives in the mold: each carries its own arrangement of molded...

The 59H packs 10 gallons of waste capacity into a 28 x 14.5 x 11 inch envelope, which makes it one of the shortest holding tanks Ronco molds: at 28 inches end to end it clears bays that a standard...

Fifty-six and a half inches long, 19 wide, 12.5 tall: the 5H is the long-and-lean take on a 40-gallon waste tank, drawn to run lengthwise along a frame rail where a wide pan will not clear the...

Forty-eight gallons puts the 60H at the big end of Ronco Plastics' RV holding-tank line, and the family around it is worth a look before you commit: the 48-gallon 92H holds the same volume in a...