Suspected gas leak
Even faint, even intermittent. Leave the house first — don’t flip switches. Call us from outside. We locate, isolate, and repair.
Gas Lines
Gas Line Installation & Repair in Sumter, SC
Gas work isn’t a DIY category. SC state law requires a licensed mechanical contractor — and for good reason. We install, extend, repair, and test natural gas and propane lines for furnaces, water heaters, ranges, fireplaces, generators, and outdoor appliances.
Licensed. Tested. Documented.
Two pressure tests. Zero shortcuts.
Gas work isn’t a DIY category. Not in South Carolina, not anywhere. State law requires gas piping work to be performed by a licensed mechanical contractor — and for good reason. Improperly sized lines starve appliances or over-pressurize them; bad joints leak slowly until they don’t; corroded black iron pipe behind walls becomes a problem you can’t see until it’s a problem you can smell.
We hold the SC State Mechanical License required for natural gas and propane piping. Every job includes a pre-work pressure test to confirm the existing system’s condition, a post-work pressure test to verify our joints, and documentation you can keep for your records or present at resale.
See how we approach every job →
When To Call
Six gas line situations that need a licensed tech.
Some are emergencies. Some are upgrades. All require the right license and the right tools.
Adding a new gas appliance
Range, dryer, water heater, fireplace, generator, grill, fire pit. We extend the line, size it correctly for the appliance BTU load, and connect to code.
Tankless water heater conversion
Tankless units demand more gas per minute than standard tanks. Existing lines are often undersized and need capacity upgrades before the new heater will perform.
Pre-sale or inspection requirement
Buying or selling a home, or facing a code inspection that flagged gas issues. We document condition, repair deficiencies, and provide written clearance.
Aging or corroded pipe
Black iron pipe lasts decades but rusts from the inside in humid crawl spaces and unconditioned basements. We inspect, test, and re-pipe when it’s time.
New construction or addition rough-in
Building new, finishing a basement, or adding a wing? We rough-in the gas line during the framing window — before drywall makes it expensive.
Smell gas? Leave the house and call (803) 481-8200. For non-emergency gas work, let’s get it quoted.
Our Process
From leak call to clearance — five steps
Same rigorous flow whether it's an emergency repair or a planned extension.
-
Leak detection
Combustible-gas detector walks every accessible run. We isolate sections, identify suspect joints, confirm exactly what’s going on before touching anything.
-
Pre-work pressure test
System charged with inert gas to baseline pressure. If it holds, existing piping is sound. If it drops, we know the scope of work before quoting.
-
Permit and scope sign-off
For new lines or significant repairs, we pull the permit, coordinate with the local jurisdiction, and walk you through the scope in writing.
-
Code-correct installation
New pipe sized to appliance load, joints made with approved sealant or press fittings, supports per code, correct clearances. No exceptions.
-
Post-work pressure test
System re-pressurized and held at test pressure. Combustible-gas detector verifies no leaks at any new joint. Results documented in writing for your file.
Why homeowners trust Advance for gas work
Licensed, tested, documented — every single job.
- SC State Mechanical License — required for gas piping in South Carolina
- EPA Section 608 certified and NATE-certified technicians
- Pressure test before and after every job, results in writing
- Permits pulled and inspections coordinated for required work
- One contractor for gas, HVAC equipment, and water heaters
- 24/7 emergency response for suspected leaks
What gas line work actually costs
Every quote is itemized, in writing, before any work starts.
- Single-appliance extension — usually $300–$800
- Longer runs or multi-appliance — $800–$2,000+
- Tankless water heater capacity upgrade — $1,500–$3,500
- Full re-pipe on older home with corroded pipe — $3,000–$8,000+
- Permit fees always included in the written quote
- Financing available on larger projects
Frequently Asked
Gas line questions, answered straight.
What should I do if I smell gas?
Leave the house immediately — everyone, including pets. Don’t flip light switches or use any electrical device on the way out. From outside, call us at (803) 481-8200, or call your utility’s emergency line if the smell is strong or you can’t reach us immediately. Do not re-enter until a technician clears the building.
Are you licensed for gas line work?
Yes. We hold the South Carolina State Mechanical License required for natural gas and propane piping work, plus EPA Section 608 certification for refrigerant handling. Gas work in SC requires this license — anyone doing it without one is working illegally and creating liability for you.
How much does gas line work cost?
Short extensions for a single new appliance: usually $300–$800. Longer runs: $800–$2,000+. Capacity upgrades for a tankless water heater: $1,500–$3,500. Full re-pipes on older homes with corroded black iron: $3,000–$8,000+ depending on house size. Every quote is itemized and includes pressure testing and permit fees.
Can I add another gas appliance to my existing line?
Almost always, yes. Most homes have enough capacity at the meter to add one more appliance — range, dryer, fireplace, outdoor grill, generator. We confirm capacity before extending and size the new branch correctly for the appliance BTU load.
Do you pull permits for gas work?
Yes. For work that requires a permit — new lines, significant repairs, appliance hookups — we pull it, coordinate the inspection, and keep the paperwork in your file. Unpermitted gas work creates real problems at resale and with insurance.
How long does gas line work take?
Single-appliance extensions: usually a half day. Tankless water heater capacity upgrades or multi-appliance runs: full day. Full re-pipes of older homes: 2–4 days depending on house size and access.
Financing & Payment Options
Flexible Financing for Repairs, Replacements & New Systems
HVAC investments shouldn't put your comfort on hold. We work with qualifying customers to spread the cost of repairs, replacements, and indoor air quality upgrades into manageable monthly payments.
Larger gas projects qualify for financing. Tankless conversions, full re-pipes, and new construction rough-ins can be financed. Soft pre-qualification in minutes.
Subject to credit approval. Financing options, terms, and qualifications may vary by lender and project type. Not all applicants will qualify. Our team can walk you through available options when you request service or an estimate.
Gas work done right
Licensed, tested, documented.
SC State Mechanical License, two pressure tests on every job, results in writing. Call (803) 481-8200 — live answering 24/7 for emergencies.