"Without fittings" reads like a missing feature until you have installed a tank with fittings in the wrong place. The B190 is a 30 gallon marine fresh water tank that ships as a clean blank precisely so the penetrations end up where your boat needs them, not where a catalog guessed. Fill on the port side because that is where your deck plate is, vent high on the inboard face, pickup at the true low corner of your installation angle - Ronco spin-welds or thread-installs each one to your marks before the tank leaves the shop.
The molding itself is FDA-compliant polyethylene intended for potable service, rotomolded in one piece so there are no seams to weep after a season of pounding. Thirty gallons of fresh water weighs about 250 lb once aboard (8.34 lb per gallon), which is real cruising range for a mid-size sailboat or a sportfisher that spends whole weekends out.
Ordering is the drawing-and-marks routine Ronco has run from Tustin, California since 1974: print the drawing below, mark your fitting locations - or place them on the on-page fitting planner - and the finished tank ships at 36 lb, light enough for one person to walk down a dock.
Compare footprints across the boat tank category, or start from the Ronco Plastics hub if you are tanking a whole build. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B190 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.
