A 25 gallon fresh water supply changes what a weekend on the hook feels like: real dishwashing, real rinses, no rationing on day two. The Ronco Plastics B464 delivers that capacity in a seamless rotomolded polyethylene body designed for below-deck marine installation.
This is a B-series dual-role molding. The shell itself is agnostic: fitted for fresh water it is a potable tank in food-contact PE, fitted for waste it is a holding tank for gray or black water.
Do the weight math before you pick the shelf it sits on: filled, this tank holds roughly 208 lb of water at 8.34 lb per gallon, on top of an 87 lb tank.
Ronco has molded marine tanks since 1974. Cross-shop the 25 gallon RV water tank if your project is on wheels rather than water, browse other boat tanks, and run shipping through the freight cost estimator. One Source Plastics is an authorized Ronco Plastics dealer.
Fittings
This tank has a molded shape (see the drawing), so it is sold as a blank tank with no fittings installed. Add the Ronco 3-inch uniseal (F3UNISEAL), a loose pipe-to-tank seal you install yourself, if you need a sealed pipe connection.
Technical drawing: download the Ronco Plastics B464 dimensional drawing - print it to plan your install. Sold blank, with no fittings installed.
