Sixty gallons in a block just over 36 x 30.25 x 14.25 inches: the BOAT54W is one of the two largest-capacity rectangles in Ronco's heavy-duty marine series, shaped wide rather than long. That near-square, low-slung geometry drops into the platform under a queen berth or a cabin sole hatch and keeps a very large water mass where it belongs - low and centered.
The H.D. wall is the point of this series: a heavier molding than the standard light-duty shells, in FDA-compliant polyethylene rated for drinking water, rotomolded in Tustin, California since 1974. Fittings are installed per order - spin-welded or thread-mounted at the locations you mark - so print the drawing below and lay out fill, vent, pickup, and sender with the on-page fitting planner before you order.
Sixty gallons is about 500 lb of water at 8.34 lb per gallon. Frame the platform for it, strap the tank into it, and keep hose runs supported. Compare the long-format 60-gallon alternative in boat tanks, estimate delivery with the freight cost estimator, or start at the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.