The B232 is a tank shaped like a floor joist: 48.5 x 10.75 x 8 inches, four feet long, narrower than a sheet of notebook paper, and holding 18 gallons anyway. Shapes like this are not designed at a desk - they are traced off the voids real boats and coaches actually have, the long skinny channels beside stringers and driveshafts where no ordinary tank has any business fitting.
Ronco lists the molding for marine and RV service as water or waste; the blank shell takes its role from the fittings you order and is never plumbed in advance. As fresh supply the polyethylene is FDA-compliant and potable-rated; as a holding tank the same seamless wall does the dirty work. Geometry advice: over a 48.5 inch run with only 8 inches of depth, installed pitch decides where the water collects, so pick the low end deliberately and put the pickup or dump there. Print the drawing below and mark it - or use the on-page fitting planner - and the Tustin, California shop spin-welds or thread-installs to your marks, as it has since 1974.
It ships at 74 lb, and full it lays about 150 lb (8.34 lb per gallon) along four feet of structure - a load most chases carry easily when the tank bears continuously rather than bridging. Strap at both ends and mid-span if the run allows.
More long-and-narrow answers are in the boat tank category and RV holding tanks; everything else is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B232 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.
