The B471 carries 34 gallons in a 50 lb marine shell, which puts it in the sweet spot for coastal cruisers: enough water for real trips, not so much that filling it rearranges the boat's trim. Full, the contents run about 284 lb - noticeable, manageable, and worth mounting low.
It is a dual-role molding, and that is worth pausing on if you are refitting: the same B471 shell that serves as an FDA-compliant fresh water tank in one boat serves as a gray/black holding tank in the next, depending entirely on the fittings ordered. If you are replumbing a whole boat, one drawing and one part number can cover both ends of the system in different roles.
Ronco installs every fitting per order at its Tustin, California plant - spin-welded or threaded, positioned to your marks, as it has since 1974. Print the drawing below, lay out your penetrations, and lock them in with the on-page fitting planner. Nearby in capacity on the land side is the 35-gallon RV1W.
Browse boat tanks for the rest of the marine line, or the Ronco Plastics hub for everything. OneSource Plastics is an authorized Ronco Plastics dealer.
