The B207 is a 22 gallon marine fresh water tank that ships at 30 lb, and the ratio between those two numbers is why polyethylene won the tankage argument. You get a genuinely useful cruising supply - about 183 lb of water when full, at 8.34 lb per gallon - from a shell one person can carry aboard under one arm.
The molding is FDA-compliant polyethylene rated for potable water, rotomolded as a single seamless piece. Seamlessness is not a spec-sheet nicety on a boat: fabricated tanks fail at their joints, and this tank has none. What it also does not have is pre-placed fittings, because Ronco installs those per order. Print the drawing below, mark the fill, vent, and pickup where your installation wants them, and the shop spin-welds or thread-installs each one to your marks - or set the locations on the on-page fitting planner and skip the pencil.
Give it a flat bearer, strap it to structure, and put the pickup at the low corner of the tank as it will actually sit - few boats mount anything level. Ronco has been building to order like this in Tustin, California since 1974, one drawing at a time.
Compare capacities either side of 22 gallons in the boat tank category, or take the wide view from the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B207 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.
