The B246 is the largest tank in this stretch of Ronco's RV book: 165 gallons in a 43.62 x 31.62 x 30.12 inch block. This is off-grid capacity - weeks of boondocking water, or the working supply for a mobile detail rig, wash trailer, or service truck that cannot come home to refill every day.
Capacity at this scale is a structural project before it is a plumbing one. Full, the B246 holds about 1,376 lb of water - at 8.34 lb per gallon, well over half a ton concentrated on roughly a three-foot-square footprint. That belongs directly over chassis structure, on a platform built for the load, with strapping sized to match. The empty tank is 138 lb, a two-person lift into the bay.
Like all B-series moldings it is dual-role and ships blank. Fresh-fitted, the food-grade polyethylene is made for potable service; waste-fitted, it is about as much holding capacity as ever rides on wheels. Print the drawing below, mark every fitting location, and the on-page fitting planner turns your marks into the spin-weld or threaded fittings Ronco installs per order in Tustin, California - their trade since 1974. A tank this size moves as freight, so price your lane with the freight cost estimator. Smaller stablemates live in RV water tanks; the whole catalog is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B246 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.
