The B455 is the 100 gallon RV-format tank: 44 x 24 x 24 inches, sized for the basement bays of diesel pushers, large fifth wheels, and purpose-built off-grid rigs. A hundred gallons is the capacity that turns a weekend boondocker into a week-long one, and this shell delivers it in proportions that most large coach bays can actually swallow.
Ronco molds it blank and fits it to your order. The shell is dual-role B-series stock - it can be plumbed potable or as a holding tank - though nearly every B455 goes out as a fresh water tank. Print the drawing below, mark fill, outlet, vent, and level-sender positions to suit your coach's plumbing, and the factory spin-welds or thread-installs each fitting to the mark. The on-page fitting planner sorts sizes.
Mind the arithmetic: a 115 lb blank becomes roughly 834 lb of tank-plus-water at full, and that mass needs frame-tied cradling, not just floor. Rotomolded in Tustin, California, where Ronco has built tanks since 1974. The full ladder of sizes is in the RV water tank category, and shipping on a tank this large is worth checking with the freight cost estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B455 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.
