Bis Certification For Low Pressure Regulators BIS certification is mandatory for low pressure regulators as per IS 9798:2013. Manufacturers must ensure that their gas regulators meet safety standards and have the BIS quality mark. This certification guarantees the safety and reliability of your gas regulator, reducing the risk of fire, explosion and other dangerous incidents. IS 9798: Low Pressure Regulators Under the IS 9798:2013 standard, all low-pressure regulators designed for use with liquefied petroleum gas (LPG) mixtures must be certified under the ISI certification scheme. Without the ISI mark on the product, these products cannot be legally sold, imported or exported to the Indian consumer market.