Nearly seven feet of tank. The 44H runs 80.75 x 14 x 6.75 inches - a 12-gallon holding tank stretched into a beam that lays along a frame rail or under a full-length slide floor where nothing box-shaped could go. Tanks like this exist because coach builders sometimes have exactly one continuous void left, and it is long, narrow, and shallow.
A molding this long is engineered against sag: it ships at a stout 29 lb, with the wall thickness to span mounting cradles without oil-canning. Fill it and you add about 100 lb of gray or black water spread across the whole run, so support it at multiple points rather than the two ends. It is a waste tank only - never plumb it into the fresh system.
Ronco molds several of these rail-runners in Tustin, California, as it has since 1974. Need more volume in the same idea? The 43H carries 20 gallons at 81 x 11 x 7.75 inches. Need a vertical panel tank instead? The 42H holds 15 gallons at 91.5 x 7 x 16 inches standing on edge. Every other footprint is in the RV holding tanks category.
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 44H 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
Product video. Watch the Ronco Plastics 44H - 12 Gallon Plastic RV Holding Tank (80.75" x 14.0" x 6.75") video (60 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.
