Gas Line Installation & Repair in Longmont, CO
New gas lines for the appliances you want, and careful repairs for the ones you already have. Licensed, pressure-tested and done right the first time.
Gas Line Installation in Longmont, Done by Licensed Plumbers
Natural gas is one of the best values in a Colorado home. It heats water fast, keeps a furnace running through a January cold snap, and makes a gas range or outdoor grill a pleasure to cook on. But every one of those appliances depends on a line that was sized correctly, joined tightly and tested before the gas was ever turned on. That is not a job for guesswork.
M&M Heating, Cooling, Plumbing & Electrical has been installing and repairing gas lines across Longmont and the Front Range since 1996. Our licensed and insured plumbers run new lines for ranges, dryers, fireplaces, outdoor grills and fire pits, water heaters, furnaces and standby generators. We also repair and replace aging lines, relocate connections during a remodel, and pressure-test every job before we leave. Where a permit and inspection are required, we handle that too.
If you smell gas right now, stop reading. Leave the house, do not flip any switches or light anything, and call your gas utility or 911 from outside. Once the utility has made the property safe, call us and we will find and fix the problem.
For everything that is not an emergency, we show up on time, explain your options in plain language and quote the work upfront. Nights and weekends never cost extra.
Gas Line Services for Every Appliance in the House
From a single new connection to a whole-home gas piping upgrade, here is where homeowners call us most often.
Gas Ranges & Dryers
Switching from electric to gas, or moving an appliance during a kitchen update? We run the new line, install the shutoff valve and make the final connection so the appliance is ready to use.
- Electric-to-gas conversions
- Appliance shutoff valves
- Flexible connector replacement
Fireplaces & Outdoor Living
Gas fireplace inserts, fire pits and built-in grills all need a properly sized supply line, often routed through finished space or across the yard. We plan the run, protect the pipe and test it.
- Gas fireplace inserts
- Patio grills and fire pits
- Buried exterior lines
Water Heaters & Furnaces
A new tank, tankless unit or furnace sometimes needs more gas than the old one. We check the existing line and meter capacity, then upsize or extend the line so the equipment performs as designed.
- Line sizing for tankless units
- Furnace and boiler supply lines
- Sediment traps and shutoffs
Standby Generators
A whole-home standby generator is only as reliable as the gas line feeding it. We size and run the supply so the unit gets steady fuel pressure under full load, then coordinate with the electrical side of the install.
- Dedicated generator supply lines
- Pressure and capacity checks
- Coordinated with our electricians
Gas Leak Repair
A rotten-egg odor, a hissing sound near a fitting, dead grass over a buried line or a higher gas bill with no explanation all call for a leak check. We locate the leak, repair or replace the section and retest the system.
Old or Corroded Gas Piping
Older Longmont homes may still have original black iron piping with aging fittings, or lines that no longer meet current standards. We inspect, replace problem sections and bring the system up to date.
The M&M Difference on Gas Work
Gas is unforgiving of shortcuts. Here is how we approach every line we touch.
Licensed & Insured for Gas
Our plumbers are licensed and insured, and gas piping is a core part of what we do, not a side job. Every line is sized for the appliance it serves and pressure-tested before it goes live.
24/7 With No Overtime Charge
Gas problems do not wait for business hours. We answer around the clock, and there is no extra charge for nights, weekends or holidays.
Upfront Pricing
You see the full price before we start. No surprise line items, no pressure to add work you did not ask for.
Family-Owned Since 1996
Nearly 30 years serving Longmont and the Front Range from our shop on South Bowen Circle. Our reputation is built on a 100% satisfaction guarantee and neighbors who call us back.
Our 4-Step Process
Whether it is a new line for a grill or a repair on an existing one, the steps are the same: plan carefully, build it right, prove it is tight.
Assess & Plan
We look at the appliance, the route, the existing piping and your meter capacity, then map the safest and most efficient path for the new or repaired line.
Quote & Permit
You get a clear, upfront price. If the job needs a permit and inspection, we pull it and schedule it so you do not have to.
Install or Repair
Our licensed plumbers run the line with the right materials, install shutoff valves where needed and make the final appliance connection.
Pressure Test & Walkthrough
Every line is pressure-tested and leak-checked before gas is turned on. We walk you through the shutoffs and answer any questions before we leave.
Gas Line Questions, Answered
What should I do if I smell gas in my house?
Leave the house right away and take everyone, including pets, with you. Do not flip light switches, use the garage door opener, light a match or unplug anything, since a small spark can ignite gas. Once you are outside and away from the home, call your gas utility's emergency line or 911. After the utility has shut off the gas and cleared the property, call us to locate and repair the leak.
Do I need a permit to add a gas line in Longmont?
In most cases, yes. New gas piping and many gas line modifications require a permit and an inspection by the local building department. We handle the permit and schedule the inspection as part of the job, so the work is documented and up to code. That paperwork matters when you sell the home or file an insurance claim.
Can you run a gas line to an outdoor grill or fire pit?
Yes. We install buried and above-ground lines to patio grills, fire pits and outdoor kitchens. The pipe is sized for the BTU rating of the appliance, protected from the elements and fitted with an accessible shutoff. Running a dedicated line means no more swapping propane tanks mid-cookout.
My new tankless water heater needs a bigger gas line. Is that normal?
It is very common. Tankless units heat water on demand and often need more gas per minute than the tank they replaced. If the existing line is too small, the unit will struggle to reach temperature or may shut down under load. We check the line size and meter capacity before installation and upsize the supply when needed.
What are the signs of a gas leak besides the smell?
Watch for a hissing or whistling sound near a gas appliance or fitting, a patch of dead or discolored grass over a buried line, bubbles in standing water near the line, or a gas bill that climbs with no change in use. Headaches, dizziness or nausea that improve when you leave the house can also be a warning sign. Any of these deserve a prompt leak check.
How long does a gas line installation take?
A straightforward run to a nearby appliance can often be finished in a few hours. Longer runs, lines through finished walls or buried exterior lines can take a day or more, and inspection scheduling can add time. We give you a realistic timeline with your quote so you can plan around it.
Need a Gas Line Installed or Repaired?
Open 24/7 | Emergency Service Available
Call (720) 608-3973Gas Line Services Across the Front Range
Proudly serving Longmont, CO and surrounding communities including Erie, Frederick, Firestone, Mead, Berthoud and Niwot.
Primary Service Area
- Longmont, CO
- Erie, CO
- Frederick, CO
- Firestone, CO
- Dacono, CO
Extended Area
- Mead, CO
- Johnstown, CO
- Berthoud, CO
- Niwot, CO
- Gunbarrel, CO
Also Serving
- Lafayette, CO
- Louisville, CO
- Superior, CO
