PAK PIONEER full relief tamper proof gas service regulators are designed to control natural gas, air, nitrogen, carbon dioxide, propane vapor, and other non-corrosive gases in residential, light commercial, and small industrial applications. It is a fully tamper proof regulator for those countries where consumers increase gas pressures by tampering. The regulator is available with a variety of body sizes material steel and brass, loading springs, and orifices sizes. An internal relief valve is a standard feature in the PAK PIONEER model.