Few production boats give you a place to put 130 gallons of anything, which is exactly why the Ronco Plastics B467 exists as a blank molding: when a hull finally offers the volume, this tank fills it without forcing a compromise on fitting placement.
The number that should drive your engineering is 1084: that is roughly the weight in pounds of 130 gallons of water at 8.34 lb per gallon. A tank this size wants a dedicated bed, bonded chocks, and strapping sized like you mean it. The 136 lb empty weight is almost a rounding error next to the load it carries.
As a B-series dual-role shell, the B467 is fresh water or waste by your choice of fittings. Fresh water orders get food-grade polyethylene in potable service; waste orders make it one of the larger gray or black holding tanks in the line. Ronco installs the fittings per order, spin-weld or threaded, at the marks you give them. Print the drawing below, dimension your compartment against it, then set port locations in the on-page fitting planner.
Molded in Tustin, California by a shop that has done nothing but plastic tanks since 1974. Freight on a piece this size is worth a look early: run the freight cost estimator, then compare against other big marine tanks in the catalog. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B467 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.
