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 holding shells - a seamless rotomolded polyethylene body that ships blank at 33 lb and carries roughly 309 lb of waste when full.
Its outline is on the technical drawing below; print it and compare against your bay before ordering. If the shape misses, its twin the 73H is the first stop, then the 36-gallon 48H at 35 x 25 x 12.75 inches below and the 39-gallon 55H at 49 x 24 x 10 inches above. Over a hundred holding shapes are indexed at RV holding tanks.
Waste service only; potable water belongs in the fresh line.
One Source Plastics is an authorized Ronco Plastics dealer.
Fittings
This holding tank ships with its outlet molded in, ready to plumb. Add the Ronco 3-inch uniseal (F3UNISEAL), a loose pipe-to-tank seal you press into the outlet yourself, with no threads or nuts.
Technical drawing: download the Ronco Plastics 66H dimensional drawing - print it to plan your install. The outlet is molded in. Add the Ronco 3-inch uniseal to connect it.
Freight
LTL freight is quoted to your ZIP with the freight cost estimator or by phone at 866-418-1777. The listed price is before freight.
See this tank
Interactive 3D model with live fill. This tank has an interactive 3D model built to its manufacturer dimensions. Rotate it, and set a fill level to see how much liquid it holds at any height. Open the 3D view on the product photo above. Download the 3D model (GLB).
Product video. Watch the Ronco Plastics 66H - 37 Gallon Plastic RV Holding Tank video (65 seconds) with dimensions, fittings and shipping notes.
Ready to order?
Add it to your cart at the top of this page, get LTL freight to your ZIP, request a written quote, or call 866-418-1777. The listed price is before freight.
