Forty-five gallons is liveaboard territory. It is showers, not just dishes; a week at anchor, not a weekend; the difference between a boat you visit and a boat you inhabit. The B197 delivers that capacity in a single rotomolded shell of FDA-compliant polyethylene - seamless, potable-rated, and shaped for a hull rather than a warehouse floor.
A tank this size makes fitting placement a structural decision, not just a plumbing one. Full, it holds about 375 lb of water at 8.34 lb per gallon - roughly the weight of two adults standing in one spot in your bilge - so the pickup wants the true low corner of the installed angle and the tank wants solid bearers under the whole footprint. Print the drawing below, mark your fill, vent, and pickup, and Ronco spin-welds or thread-installs each fitting to those marks before shipping. The on-page fitting planner lets you place them by click instead.
The bare tank ships at 116 lb, so recruit a second pair of hands for the trial fit. It comes from the Tustin, California shop where Ronco has rotomolded marine tankage since 1974 - the same catalog boatyards raid when a builder needs big capacity in an odd cavity. For a shipment this size, our freight cost estimator will price the lane to your ZIP before you commit.
Compare large-capacity footprints in the boat tank category, or see the full spread on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B197 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.
