Ronco Plastics

When a coach was built around a 37-gallon waste tank, a 35 or a 40 does not solve the problem - the plumbing stubs and the cavity were framed for that shape. The 73H exists for those installs: one of...

At 25 lb for 42 gallons of capacity, the 74H is the lightest shell in Ronco's 42-gallon holding quartet - the pick when the tank rides in a supported cradle or framed compartment and the installer...

Twenty-nine pounds is all the 75H asks you to lift into position - the lightest shell on Ronco's five-deep 45-gallon holding bench, and a genuine difference when you are flat on your back under a...

The 76H is the heavy one. Where most 11-gallon blanks come off the mold in the low teens of pounds, this tank ships at 32 lb - nearly three times the material of its sibling. That extra polyethylene...

Gray water or black water - the 77H does not care, but your plumbing layout does, and that is the decision this tank is usually bought to settle. As a 20-gallon blank with no pre-molded valve...

Twenty-one gallons is a between-size, and that is exactly why the 78H exists. The 20 gallon class below it is crowded and the 25 gallon class above it is crowded, but if your coach came with a 21...

Somewhere there is a fifth wheel sitting dead in a storage yard because its 33 gallon gray tank split and the manufacturer went under in the last downturn. The 79H is the kind of molding that revives...

Single-digit part numbers in Ronco's catalog mark the old guard, and the 7H is one of them - a 16-gallon holding tank that has been in continuous production long enough to have replaced its own...

Ronco fields five different 45-gallon holding shapes - the deepest bench at any capacity in its waste line - and the 83H anchors it. Five molds at one volume is what almost fifty years of cutting...

Forty gallons is the workhorse size for gray tanks on mid-size coaches - big enough that showers do not fill it in a weekend, small enough to package under the floor. The 84H is the lightest of...

At 47 lb of bare shell, the 85H is the heaviest molding among Ronco's 36-gallon holding tanks - noticeably more polyethylene than the 32 lb 37H or the 27 lb 48H at the same capacity. When a tank...

The 87H is the heavy-wall option in Ronco's five-shape 45-gallon holding bench: 41 lb of polyethylene before any waste goes in, the most material of the group. For a tank that will spend its life...