Ronco Plastics

On a lot of coaches the dump valve hangs outboard, just inside the skirt - and feeding it from an end-dump tank means a rigid elbow that traps waste and eventually leaks. The 61H is molded for that...

The 62H is a square: 24.5 x 24.5 inches, 11.5 deep, 26 gallons. Square tanks exist because square holes exist, usually the bay left over between two frame members after everything else was packaged,...

A 27 gallon black tank holds about 225 pounds when it is time to dump, and the 64H is built for exactly that duty cycle: fill over days, carry down the highway, drain in minutes, repeat for years. It...

Seventeen pounds. Among Ronco's crowded field of 20-gallon holding tanks, the 65H is the lightest blank - a full-size waste tank you can carry under one arm up a ladder into a mid-build coach. For...

Thirty-seven gallons is an oddly specific capacity, and that is the point: Ronco's mold library exists to match coach cavities, not catalog round numbers. The 66H is one of two 37-gallon gray/black...

Twenty-four gallons is a size Ronco molds exactly once, and the 67H is it. RV floor plans cluster their waste tanks at 22 and 25 gallons, which leaves the 24 gallon coach owner staring at near-misses...

Fifty-three pounds of polyethylene before a drop of water goes in: the 68H is the heavyweight of Ronco's 33 gallon holding tanks, carrying roughly double the material of its siblings. In a rotomolded...

Between the crowded 17-gallon class and the popular 19s and 20s, the 69H holds the 18-gallon line - a capacity Ronco keeps in the range because OEM bays were built around it and replacements have to...

The side dump is the defining feature of the 6H: the waste valve exits through the side face of the tank instead of the bottom or end, which is how many coaches route their termination plumbing when...

The 70H is the 15-gallon holding tank you buy for the rough route. At 19 lb it carries meaningfully more polyethylene than the standard blank in this size, and that extra wall is what stands between...

Replacing a failed gray tank in a coach nobody makes parts for anymore is mostly a matching problem, and that is what a four-deep bench of 40-gallon shapes is for. The 71H is one of Ronco's four...

When the tank you are replacing has no legible part number, the 72H is one of four 27 gallon shapes Ronco keeps molding, and the family is best searched by elimination. Start with the dimensioned...