Every hull has one awkward volume that the standard tank catalog cannot touch, and Ronco's habit since 1974 has been to cut a mold for it anyway. The Ronco Plastics B172 - 23 gallons, shipping at 26 lb - is one of those answers: a distinct footprint in the marine fresh water line from the Tustin, California plant, kept in production because somewhere a class of boats needs exactly this shape. The drawing below is the fastest way to find out if yours is one of them.
The molding is FDA-compliant polyethylene for potable water, and it ships with fittings installed per order: spin-welded or threaded, at whatever sizes and positions you mark. That flexibility is worth exploiting - match an old tank's ports to reuse existing hoses, or redesign the layout the old tank got wrong. Print the drawing, mark it, and lock the configuration with the fitting planner on this page.
Full, the B172 holds about 192 lb of water. Mount it on a flat, supported base with restraint that assumes motion, and it disappears into the boat for decades. The rest of the capacity ladder is at boat tanks, the complete family at the Ronco Plastics hub, and per-ZIP shipping at the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B172 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.
