Install Gas Pipe, Iron Gas Pipe, Install Gas Line, Adds Gas Line, Adds Iron Gas PipeMock Plumbing Company in Baton Rouge, Louisiana added a gas line for a customer opening a new bakery. The bakery is going to have several gas appliances. Mock Plumbing ran 1 ½” black iron gas pipe approximately 300 feet from meter to bakery. More and more customers are utilizing gas for cooking, heating water and pools, and lighting.