The 712COVER fits a tank most catalogs do not even offer: Ronco's 7.5 gallon open top. In-between sizes like that come out of Tustin, California because real processes asked for them - a batch volume that a smaller tank could not hold and a bigger tank wasted - and once the tank exists, it deserves a lid molded to it rather than a compromise borrowed from the next size up.
This is that lid: 2 pounds of molded polyethylene shaped to the 7.5 gallon tank's rim. Seated, it does what covers do everywhere in a process shop - keeps dust, drift, and stray objects out of the solution, slows evaporation from the exposed surface, and lets a prepared batch sit overnight without changing character. The difference at this size is proportion: small batches feel every gram of contamination and every bit of vapor loss.
Cover and tank share the same resin family and the same maker - Ronco has molded polyethylene process equipment at the Tustin plant since 1974 - so chemical service that suits the tank suits its lid.
Find the matching tank and its siblings at the Ronco Plastics hub, and price shipping at the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
