Six feet of water tank, thirteen inches tall: the B259 runs 71.5 x 26 x 13 inches, laying 95 gallons flat along a coach's basement bay or beneath a raised floor. It is the long way to carry big water - the load spreads across the chassis instead of piling onto one point, and the low profile keeps the coach's center of gravity where it belongs.
Even spread out, 95 gallons is mass: about 792 lb full, and the 125 lb molding itself is a two-person carry. Bed the tank continuously - a six-foot span supported only at the ends will work itself over every mile - and strap against fore-and-aft surge, which is the force a long tank feels most.
The B259 ships as a blank B-series dual-role molding: fresh-fitted, its food-grade polyethylene carries potable supply; waste-fitted, it is one of the largest low-profile holding tanks in the book. Print the drawing below, mark every fitting location along the long top face, and the on-page fitting planner specs the spin-weld or threaded fittings Ronco installs per order in Tustin, California - their craft since 1974. Price the lane with the freight cost estimator, see shorter alternatives in RV water tanks, or browse the full line on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B259 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.
