Suitable for Govt. Home Gas Cylinders ISI Marked LPG Gas Regulator Material: Cast Iron with Plastic Fittings Gas regulator is suitable for Govt. home Gas cylinders. A must essential for home gas cooking: gas regulator is fitted on the gas cylinder to on/off the gas pressure. This regulator are made and checked under quality supervision before dispatch to consumers. According to standard regulations issued by the petroleum agencies one must change its cooking gas regulator and pipe in every 3-5 year period 'compulsorily' or there is a high risk of leakage and fire break out any time at your house.