Everyone in industry knows the 55 gallon size - it is the drum volume, the default unit of shop liquid. Ronco's 55 gallon open top tank puts that familiar volume in a wide-mouth cylindrical vessel you can actually work in, and the 55COVER is its lid: 5 pounds of molded polyethylene, shaped to the tank's rim, restoring drum-like closure to a tank chosen for its open access.
That trade - open for work, closed for storage - is the whole rhythm of an open-top process tank, and the cover is what makes the second half real. Seated, it keeps shop dust, overspray, and stray objects out of the solution and slows the evaporation that quietly concentrates or depletes standing chemistry. Off, it hangs on a hook and weighs nothing worth mentioning.
It is a factory part from Ronco's Tustin, California plant, molding polyethylene tanks and accessories since 1974. Same resin family as the tank body, same tooling discipline, which is why it fits the way aftermarket discs do not.
Match it to the tank at the Ronco Plastics hub, and price the shipment with the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
