One hundred twenty-five gallons is where an RV water system stops being a convenience and becomes infrastructure, and the B247 packages it in a 43.12 x 29.88 x 24 inch block sized for a full-height storage bay. Extended boondocking, a crew trailer, a mobile grooming or pressure-wash build - this is the capacity those rigs actually consume.
Weigh the water before you mount the tank: about 1,042 lb full, over half a ton, on a footprint a little larger than a yard square. Set it over frame structure near the axles, on a platform that spreads the load, with straps that assume a panic stop. Empty, the 123 lb molding is a two-person carry.
It ships as a blank B-series dual-role molding: fresh-fitted, the food-grade polyethylene serves potable supply; waste-fitted, the same shape is a very large gray or black holding tank. Print the drawing below, mark your fitting locations, and use the on-page fitting planner to spec the spin-weld or threaded fittings Ronco installs to your marks in Tustin, California, as they have since 1974. Check your delivery lane with the freight cost estimator, browse alternates in RV water tanks, or see the full line on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B247 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.
