
Used Walker DOT407 Food Grade Tanker Trailers for Sale — What You Need to Know
A DOT407 food grade tanker trailer is a liquid cargo tank that has been designed, inspected, and federally certified to hold 15 PSIG (pounds per square inch, gauge) of working pressure. The “407” refers to the specific standard under 49 CFR (Code of Federal Regulations) that governs low-pressure liquid cargo tanks.







