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.
Every 66H is molded to order in Tustin, California - a shop rotomolding continuously since 1974 - with no factory-cut holes. Mark your drain, vent, and inlet locations on the printed drawing and Ronco installs the fittings per order, spin-welded or threaded, so the tank drops into your plumbing rather than the other way around. Waste service only; potable water belongs in the fresh line.
OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 66H dimensional drawing - print it to plan your install and mark exactly where you want fittings located; Ronco installs spin-weld or threaded fittings to your marked spec.
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).
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.
