Ronco RV Holding Tanks

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...

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...

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...

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...

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...

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...

Forty-three gallons does not appear in anyone's marketing plan - it appears when a mold is cut to fill a specific coach cavity to the brim. The 88H is that kind of tank: the lone 43-gallon shell in...

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...

Every Ronco holding tank begins life the same way: a seamless rotomolded blank with no holes in it. The 89H is that idea at 53 gallons - a large-capacity waste tank that does not commit to a plumbing...

The 24W is a long-hauler's tank: 43 inches of length, 16 wide, 10.5 tall, 27 gallons. That aspect ratio is built for the underfloor run alongside a driveshaft, the full length of a pickup bed...

Eight inches tall, 50 inches long. The 50W is the first of Ronco's plank series - three moldings sharing the same 16 inch width and 8 inch height, growing only in length. This one holds 23 gallons,...

The B133 is a pancake: 57 x 26.5 x 9.25 inches, under ten inches tall, spreading 53 gallons across nearly five feet of floor. Tanks this flat are how big capacity hides under a berth or an RV floor...