Service
Gas Line Replacement
Replacing gas pipework that has corroded, been outgrown by the appliances on it, or failed a test, with the load recalculated for what it now serves.
- Licensed and insured
- Price agreed before work
- A plumber who works your area
Replace the sizing, not just the pipe
A replacement is the one opportunity to correct a system that may have been marginal for years.
The original pipework was sized for the appliances that existed when it was installed. Since then the house has probably gained things: a gas range, a dryer, a second water heater, an outdoor grill or a generator.
Each addition raised the load on the shared sections, and nobody recalculated.
The symptom is subtle: appliances that underperform when several run at once, a furnace that struggles on the coldest morning while the oven is on. It reads as appliance trouble and it is a supply problem.
Recalculating during a replacement costs nothing. Doing it afterwards means replacing the pipe again.
Surface rust and structural rust
On exposed steel gas pipe, the distinction is worth knowing because it decides between doing nothing and replacing a run.
Surface rust is a light orange film on otherwise smooth pipe. It is normal on steel in a damp environment and does not, on its own, mean the pipe is compromised.
Pitting and flaking is different. Where the surface has become rough, or where rust lifts away in layers leaving craters, the wall thickness is reduced and it is reducing further.
The places to look are outdoor runs, crawl spaces, and anywhere pipe passes through or rests against damp masonry. It is a slow failure with years of warning, and it is entirely possible to catch it before it becomes a leak.
Does this sound familiar?
Problems this service solves
- Corroded gas pipework at the end of its life
- A system that has failed a pressure test
- Undersized pipe starving appliances
- An installation flagged during an inspection or sale
- Pipework damaged by structural work or excavation
Signs you need gas line replacement
If more than one of these is true, the problem is usually past the point a plunger or a store-bought cleaner will fix.
- Exposed pipe is pitted or flaking rather than surface rusted
- Appliances underperform when several run together
- A pressure test would not hold
- An inspector has flagged the installation
What to expect
How the visit works
Recalculate the load
The replacement is sized for the appliances on the system now, which is often not what it was originally designed for.
Plan route and materials
Material and routing are chosen for where the pipe actually runs, with protection where it passes through or sits against structure.
Replace and support
The old run is removed and the new one installed with correct support and protection rather than reproducing the previous arrangement.
Test, inspect, commission
The system is pressure tested, inspected where required, and every appliance relit and checked before it is handed back.
What's included
What you get on every job, whoever we send.
- Load recalculated rather than the old sizing copied
- Protection and support corrected, not reproduced
- Pressure tested and inspected before use
- Every appliance relit and checked at handover
Questions
Gas Line Replacement questions
When does a gas line need replacing rather than repairing?
When the failure is a condition rather than an event. A joint that has leaked, or a section damaged by other work, is a repair. Pipe that is pitted and flaking along its length has lost wall thickness and will fail again elsewhere. A system that will not hold a pressure test at all, or that is undersized for the appliances now on it, also needs replacing rather than patching, because the problem is the installation rather than one point in it.
Why recalculate the sizing if the pipe is being replaced like for like?
Because the appliances have probably changed since it was installed. Houses gain gas ranges, dryers, second water heaters and outdoor appliances over the years, and the original pipe was sized for whatever existed then. Replacing like for like reproduces a system that may already have been struggling. Recalculating costs nothing at the planning stage and is the only time it can be corrected cheaply.
How long does a gas line replacement take?
For a typical residential system, usually a day or two depending on the length of the run, how accessible it is, and how much has to be opened up to reach it. Gas is off for the duration, which means no heating, hot water or cooking on gas appliances while the work is in progress, so it is worth planning around. Inspection scheduling can also affect when the system can be put back into service.
Related services
Gas Line Installation
Running new gas lines for ranges, dryers, water heaters, fire pits and generators, sized for the appliance and pressure tested before use.
See what this coversGas Line Repair
Repairing gas lines and connections, with the leak isolated and the system pressure tested afterwards rather than simply tightened and left.
See what this coversGas Leak Detection
Locating gas leaks with detection equipment and a pressure test, including the small leaks that never produce a smell strong enough to notice.
See what this coversWater Heater Repair
Diagnosis and repair of gas, electric and tankless water heaters, including no-hot-water calls, leaks, pilot problems and sediment flushing.
See what this covers
Get it fixed
Gas Line Replacement, handled locally
Call with your ZIP code and what you are seeing. We route you to a licensed plumber in your area who does gas line replacement every week.
- Licensed and insured
- Answered 24/7
- Price before work