MULTI-VALVE 100LB TANK: Includes a service valve, high-capacity filler valve with integral back-check, pressure relief valve (375 PSIG ), and a POL valve, all in one single unit ON-SITE REFILLING: No need to transport your tank to get refilled; the multi-valve 100LB tank allows you to do on-site refilling of your propane gas without disconnecting your appliances HIGH-GRADE STEEL welded construction; powder coated for rust prevention and long-lasting exterior protection DOT APPROVED, X-ray and hydrostatic tested Filler Valve: CGA-791 / 1¾" Female ACME Fill Port; requires use of a 1¾" Male ACME adapter with bleeder (vent valve) for refilling. APPLICATION: 100LB propane tanks are great for mixed heating systems, home fireplaces, dryers, grills, food trucks, catering services, and many more NOTE: This propane tank is EMPTY and comes pre-purged and ready to be filled with gas