RV Holding Tanks

The 10H is the straightforward box of Ronco's 22 gallon holding tank family: 34 x 22 x 12 inches, no exotic proportions, the shape a coach builder reaches for when the compartment is a plain...

The Ronco 17H is a 25 gallon gray or black water holding molding, about 26 pounds empty and roughly 208 pounds full at 8.34 pounds per gallon, with no potable rating. It comes out of Tustin,...

Six feet two inches of tank, eight and a quarter inches tall. The 45H spreads its 25 gallons across a 74 x 15 x 8.25 inch envelope, which is the geometry of an underbelly installation: slung low...

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...

The 106H carries the highest mold number in Ronco's holding library - one of the newest additions to a collection that has been accumulating in Tustin, California since 1974. New molds get cut for...

The Todd Marine 35-gallon marine water & holding tank (85-1525WH) is a one-piece rotationally molded polyethylene tank engineered for potable water storage or waste holding aboard boats and RVs. The...

The 42H is a wall of a tank: 91.5 inches long, 16 inches tall, and only 7 inches thick. Fifteen gallons of holding capacity stood on edge like a panel. Builders spec this shape to run vertically...

At about 22 pounds, the 95H is the lightest blank among Ronco's six 25 gallon holding tanks, which matters most at installation time, when you are the one holding it overhead in a wheel well with one...

If you sketched a generic RV holding tank from memory, you would draw something very close to the 11H: 37 x 20.25 x 11.5 inches, a proportioned rectangle that fits the classic under-floor waste bay...

Dump geometry is the quiet reason waste tank replacements go sideways, and it is the reason the 14H exists as a distinct 26 gallon molding. Its outlet is configured for an end dump, valve at the end...

The 47H anchors the large end of Ronco's mainstream holding tank boxes: 43 x 22 x 11.25 inches, 27 gallons, the sort of tank that serves as the black tank under a full-time couple's fifth wheel. The...

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...