The fact is that only qualified contractors should be installing or repairing gas lines, such as contractors that hold a C-36 plumbing license or that have other qualifications that have been authorized by the state of California (SO CAL GAS COMPANY). Knowing and staying current with local and state level gas codes can be tricky as the plumbing industry changes and gets more high tech with its controls and new materials; even for the most experienced of contractors. Roberts Plumbing Hydro Jet & Rooter has many years of installing new natural gas or propane gas systems, making repairs, installing earthquake safety shut off valves at gas meter locations or gas leak locating. Please feel free to contact Roberts Plumbing Hydro Jet & Rooter to discuss your gas piping/plumbing questions before you take matters into your own hands.