On Ronco's own price sheet this mold is the 56W, stamped at a conservative 7 gallons; we catalog it at the 9 gallons it actually holds. Either way the geometry is the selling point: 20.5 x 12.75 x 8 inches, an 8 lb loaf-shaped molding low enough to hide under a dinette seat or in the dead space above a wheel well.
It is light-duty potable spec - FDA-compliant natural polyethylene with the translucent wall that turns the tank into its own sight gauge. Full, count on roughly 75 lb of water, which is why the flat bottom and low height matter: the mass sits low and spreads wide.
Also worth a look: the 9-gallon RV31W in a different form factor and the 8-gallon RV21W at 17.75 x 15.75 x 8.25 inches; the rest are under RV water tanks.
One Source Plastics is an authorized Ronco Plastics dealer.
Standard fitting package
Choose the standard fitting package for $30 and we install these three fittings before the tank ships:
| Fitting | Size | Location |
|---|---|---|
| Inlet | 1-1/4" female NPT | Top center |
| Outlet | 1/2" female NPT | Bottom center |
| Vent | 1/2" female NPT | Top corner |
Want to place the fittings yourself? Choose the blank tank: it ships with no fittings at no charge. Add the 90-2218 fitting kit ($55.75). It includes an access plate with six stainless steel screws, washers and nuts to mount it, a 1-1/2" NPT plug, two 1/2" NPT plugs, two 5/8" thru-hull fittings for supply and vent, and one 1-1/2" thru-hull fitting for fill.
Technical drawing: download the Ronco Plastics RV56W dimensional drawing - print it to plan your install. Choose the standard fitting package (shown in the fitting layout image), or order the tank blank and place your own fittings.
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 RV56W - 9 Gallon Plastic RV Water Tank (20.5" x 12.75" x 8.0") video (64 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.
