Replacing a failed metal or fiberglass water tank is where the Ronco Plastics B481 earns its keep. At 30 gallons, in a seamless rotomolded polyethylene shell, it drops into refit projects with none of the corrosion, crevice, or gel-coat-taste problems of what it replaces, and Ronco puts the fittings where the old plumbing already runs.
That last part is the B-series advantage: this is a dual-role molding with nothing pre-installed. Mark the drawing with your existing hose positions and Ronco spin-welds or threads each fitting per order at those coordinates. Ordered for fresh water, the food-contact polyethylene stores drinking water; ordered for waste, the same tank becomes a gray or black holding tank in the identical footprint.
Plan mounting around about 250 lb of water at capacity, 8.34 lb per gallon, plus the tank's own 89 lb. Print the dimensioned drawing below and work through the on-page fitting planner before ordering so the new tank plumbs in like it grew there.
Ronco Plastics has molded in Tustin, California since 1974. Compare the 30 gallon RV water tank and 30 gallon holding tank if your role is fixed, or browse all boat tanks. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B481 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.
