The Ronco Plastics B178 is Ronco's other 50 gallon heavyweight - a distinct footprint from the same Tustin, California tooling floor, shipping at 132 lb. Two different large moldings at the same capacity is not redundancy; it is the recognition that by the time a boat needs 50 gallons of fresh water, the compartment is dictating terms. Check the drawing below against your space first: at this size, geometry is the purchase decision.
The shell is FDA-compliant polyethylene for potable service, finished the way Ronco has finished tanks since 1974 - fittings installed per order, spin-welded or threaded, at the sizes and locations you specify. On 50 gallons that freedom is worth real planning: pickup at the drain point under load, venting that survives heel, fill aligned with the deck. Print the drawing, mark the ports, and put the layout through the fitting planner on this page.
Full, the B178 holds about 417 lb of water, so the installation is carpentry with consequences: continuous support under the bottom, hold-downs anchored to structure, mass kept low where it earns its keep as ballast. Cross-check the alternative large shapes at boat tanks, see everything Ronco makes at the Ronco Plastics hub, and price shipping to your ZIP with the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B178 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.
