If you are fitting fresh water capacity into a trailer, camper, or van where every pound matters, the Ronco RVB220 delivers the 43 gallon class at a modest shipping weight of about 36 pounds. It is a light-duty potable water tank made for RV service, molded from natural polyethylene that is FDA compliant for drinking water contact.
The natural, unpigmented resin leaves the wall translucent, which is a practical feature rather than a cosmetic one: you can check remaining water by eye, straight through the tank. Rotational molding produces the RVB220 as a single seamless unit, with no joints or weld beads to weep over years of road vibration. Ronco Plastics has been molding tanks this way in Tustin, California since 1974.
The tank ships with its plumbing connections already installed, because Ronco places spin-weld or threaded fittings to the specification you provide with your order. That is standard practice across the Ronco line, and any drawing shown depicts the blank molding before fittings are located. OneSource Plastics supplies the RVB220 as an authorized Ronco Plastics dealer.