Licensed Natural Gas Piping Pressure-Tested on Every Job

Natural gas piping work in the Denver metro requires a licensed plumber — not a handyman, not a general contractor, and not a YouTube tutorial. The stakes are real: undersized pipe starves appliances of pressure, improper thread sealant on black iron fittings creates slow leaks, and poorly bonded CSST can arc during a nearby lightning strike and ignite. Every gas job Deft Plumbing completes includes a standing pressure test held for a minimum of 15 minutes, a soap-bubble inspection at every connection, and a final operational test on each appliance before we pack up. We size every run by BTU demand and pipe length — a 3/4-inch line that works fine for a furnace 10 feet from the meter will drop pressure at 60 feet when a high-BTU range is also running. We handle new runs, appliance hookups for stoves, dryers, water heaters, and outdoor fire pits, and leak repair and line replacement in older homes. Flat-rate pricing before we start. No surprises.

Gas Line Installation for Appliances — Step by Step

The job starts with a load calculation. We add up the BTU rating of every appliance on the run, account for the distance from the meter, and size the pipe accordingly. Cutting corners on pipe diameter is one of the most common shortcuts — it passes a static pressure test but causes burner flutter and ignition problems under real load. We use black iron pipe or CSST (corrugated stainless steel tubing) depending on the application. CSST requires bonding to the home's grounding system; skipping that bond is a code violation and a fire risk. We install a code-required sediment trap at every appliance, a shutoff valve within 6 feet of each connection, and a union or flare fitting for future serviceability. Every joint gets pipe dope rated for gas — not Teflon tape, which can shred and clog gas orifices. Final steps: standing pressure test, soap-bubble check at every fitting, operational test with the appliance running.

Gas Leak Detection and Repair

If you smell rotten eggs near a gas appliance or your gas bill jumps without any change in usage, leave the house immediately. Don't flip any light switches, don't use your phone inside, and leave the door open behind you. Call us from outside at (720) 880-8064. We use electronic combustible gas detectors calibrated for natural gas and pressure drop testing to find leaks without tearing apart walls unnecessarily. The most common failure points in the Denver area: corroded fittings at the meter on homes from the 1970s and 80s, loose flex connector nuts behind stoves that vibrate loose over years of use, dried-out thread compound on older black iron joints, and flexible connectors that are past their service life and should have been replaced a decade ago. We repair or replace only what's actually failing.

Code Compliance and Permit Requirements

Colorado gas piping must meet UPC standards and local amendments. That means support hangers every 6 feet for black iron pipe, sediment traps at each appliance inlet, an accessible shutoff within 6 feet of every appliance, and approved materials throughout. CSST requires bonding per the manufacturer's installation guide and the National Fuel Gas Code — many older CSST installations in the Denver metro predate that requirement and are technically non-compliant. Any new gas line, extension, or appliance connection that modifies existing piping requires a permit in Aurora and most Denver metro jurisdictions. We handle the permit application, schedule the inspection, and make sure the work passes the first time. That permit record also protects you at resale and with your homeowner's insurance.

Common Failure Points in Older Denver-Area Gas Systems

Homes built before the mid-1980s often have undersized black iron pipe sized for two or three appliances. Add a tankless water heater, a high-BTU range, and a gas dryer, and the system can't deliver adequate pressure to all three simultaneously. The symptom: burner flame fluctuation when another appliance kicks on. Other frequent problems include corroded unions and elbows at the meter connection, deteriorated joint compound on threaded fittings that were installed 30 or 40 years ago, and flexible appliance connectors behind stoves and dryers that have been kinked, stretched, or simply aged past their safe service life. We assess the whole system when we're on-site, not just the one appliance you called about — because a leak somewhere else matters whether or not it triggered the service call.

Gas Work You Can Handle vs. Work That Needs a License

Pulling an appliance away from the wall and closing its dedicated shutoff valve while you clean behind it — that's fine. Reconnecting a flex connector to an existing valve after moving the appliance back — also manageable if you have the right wrench and do a soap-bubble test. Running any new gas piping, adding a tee to an existing line, extending a run to a new location, replacing corroded fittings, or installing any new appliance that requires modifying the gas system — that's licensed work in Colorado. Beyond the legal requirement, the physical consequence of one missed fitting is severe: a small gas leak in an enclosed room can reach the lower explosive limit within minutes. The flat-rate cost of a professional installation is a fraction of what a preventable incident costs. Call (720) 880-8064 and we'll tell you upfront exactly what the job involves and what it will cost.

Need Natural Gas Piping?

Contact Deft Plumbing for a free, upfront quote. No surprises, no hidden fees. We're licensed, bonded, and insured for your protection.

Call (720) 880-8064 or request a free estimate online.

Related Services

Service Areas

We provide natural gas piping services across the Denver metro area, including Aurora, Lakewood, Arvada, Westminster, Thornton, Broomfield, and more.

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