Every boatyard has the story: the perfect tank that could not make the turn at the bottom of the companionway. The B228 is a 30 gallon marine fresh water molding whose proportions exist for exactly that reason - Ronco keeps multiple 30 gallon shapes in the catalog because getting a tank into a boat is half the engineering, and this outline is drawn for compartments the other shapes cannot reach. Print the drawing below and walk the route from deck to locker before you decide.
Once in place, it is everything a cruising water tank should be: one-piece rotomolded FDA-compliant polyethylene, potable-rated, seamless, with nothing aboard to corrode. It ships at 97 lb, blank. Fittings go on per order - mark the fill, vent, and pickup on the printed drawing or click them onto the on-page fitting planner, and the shop spin-welds or thread-installs each one to your marks so the tank arrives matched to hoses you have already planned.
Thirty gallons is about 250 lb of water at 8.34 lb per gallon: real range for a cruising couple, and a real load for the structure beneath it. Full-footprint bearers and straps into stringers are not optional. Ronco has molded to that standard in Tustin, California since 1974.
The sibling 30 gallon outlines are in the boat tank category; the complete catalog is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B228 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.
