The Ronco Plastics B410 is a 5 gallon molding in an 18 x 13.5 x 7 inch low block, a different footprint from Ronco's other small tanks so that one of them fits whatever odd void your build presents. It ships at 11 lb. As a B-series dual-role shell it serves as a small potable fresh water tank in food-grade polyethylene or as a single-fixture gray water catch, decided by the fittings you order.
Even full it weighs only about 42 lb at 8.34 lb per gallon, so it mounts almost anywhere with simple straps.
Fittings go on per order, spin-welded or threaded where you mark them, which is what lets a tank this small plumb cleanly in a space with no room to adapt. Print the drawing below, mark your connections, and run the fitting planner on this page. Small order, same Tustin, California craftsmanship Ronco has delivered since 1974.
See other compact tanks under RV holding tanks, RV water tanks, and boat tanks. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B410 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.