Does a gas company have a duty to ensure the safety of the gas supply to a customer's premises?

Ambriz v. Petrolane Ltd., supra, 49 Cal.2d 470, 319 P.2d 1 does not impose such a duty on defendant. It imposes a duty only to make sure the lines carrying the gas to the customer's premises are safe. (At pp. 478-480, 319 P.2d 1.) Even if this duty could be extended to appliances, it would extend only so far as a duty to ensure that the appliances were not in such a condition as to render it unsafe to supply gas to them, i.e., the mere supply of gas to the appliances would not create a danger of explosion or fire. The focus of Ambriz is the safety of the process of the gas company's supply of gas to the customer.