Gas Line Services in Southern Maryland — Deep Dive Plumbing Maryland
Gas Line Services in Southern Maryland
Licensed Master Plumber & Gas Fitter — License #98433
Gas line installation, repair, leak detection, and appliance connections throughout Calvert and Anne Arundel County. Terry Foster holds both a Maryland Master Plumber license and a Gas Fitter license — one of the few plumbers in Southern Maryland qualified to do it all.
Why a Licensed Gas Fitter Matters
In Maryland, gas line work must be performed by a licensed plumber or gas fitter. Terry Foster holds both a Maryland Master Plumber license and a Gas Fitter license (License #98433) — which means Deep Dive Plumbing Maryland can legally perform all gas line installation, repair, and testing work in the state.
Many plumbing companies in Southern Maryland are not licensed for gas work and must subcontract it out — adding cost and coordination delays. When you call Deep Dive Plumbing Maryland for gas line work, you get a licensed Gas Fitter who can diagnose the problem, pull the permit, perform the work, and coordinate the final inspection — all in one call.
Gas line work is not something to cut corners on. Improper installation, inadequate pressure testing, or missing permits can create serious safety hazards and liability issues. We do it right, with the proper license, permit, and inspection every time.
Gas Line Services We Provide
From new gas line installation to leak detection and repair — all performed by a Maryland Licensed Gas Fitter.
Gas Line Installation
New gas line runs for generators, grills, fire pits, stoves, dryers, and whole-home appliances. Code-compliant installation with permit coordination.
Gas Line Repair
Repair of leaking, corroded, or damaged gas lines. Pressure testing to verify the repair before restoring gas service.
Gas Leak Detection
Professional gas leak detection using pressure testing and electronic detection equipment. We locate the leak before any repair work begins.
Appliance Gas Connections
Gas line connections for stoves, dryers, water heaters, fireplaces, generators, and outdoor grills. Flexible connector replacement and shutoff valve installation.
Gas Pressure Testing
Full system pressure testing to verify gas line integrity after installation, repair, or when purchasing a home.
Gas Shutoff Valve Replacement
Replacement of aging or malfunctioning gas shutoff valves at appliances and the main line.
Warning Signs of a Gas Line Problem
If you notice any of these signs, call us immediately. Gas leaks are a serious safety hazard.
Our Gas Line Process
Safety Assessment
We begin every gas line job with a safety assessment — checking for existing leaks, verifying shutoff valve operation, and evaluating the condition of existing gas lines.
Pressure Testing
We pressure test the gas line system to verify integrity before and after any work. This confirms there are no existing leaks and that our repair or installation is leak-free.
Permit Coordination
We pull the required permit from the local jurisdiction before beginning work. Gas line work without a permit is illegal and creates liability issues for homeowners.
Code-Compliant Installation or Repair
All gas line work is performed to Maryland code requirements — proper pipe sizing, correct fittings, adequate support, and proper bonding for CSST installations.
Final Pressure Test & Inspection
After completing the work, we perform a final pressure test and coordinate the inspection with the local jurisdiction. We don't restore gas service until the system passes.
Recent Gas Line Job — Dunkirk, MD
Recently in Dunkirk, a homeowner wanted to add a whole-home standby generator — which required a new gas line run from the meter to the generator pad on the side of the house.
We pulled the permit, ran a new 1-inch gas line from the meter, installed a dedicated shutoff valve at the generator, pressure tested the entire system, and coordinated the final inspection with Calvert County. The homeowner had their generator connected and running within two days.
This is the kind of job that requires a licensed Gas Fitter — not just a plumber. Terry Foster's dual license means we can handle the full scope of gas line work in one call, without subcontracting.
Gas Line FAQs
Can I smell a gas leak?
Natural gas is odorless, but gas companies add mercaptan — a chemical that smells like rotten eggs or sulfur — so leaks can be detected. If you smell this odor near a gas appliance or line, leave the building immediately, don't operate any switches or appliances, and call your gas company and 911 from outside. After the immediate danger is addressed, call Deep Dive Plumbing Maryland to locate and repair the leak.
Can a plumber do gas line work in Maryland?
In Maryland, gas line work must be performed by a licensed plumber or gas fitter. Terry Foster is a Maryland Licensed Master Plumber AND Gas Fitter (License #98433) — one of the relatively few plumbers in Southern Maryland who holds both licenses. This means we can legally perform all gas line installation, repair, and testing work in Maryland.
Do I need a permit for gas line work?
Yes — most gas line work in Maryland requires a permit from the local jurisdiction. Deep Dive Plumbing Maryland handles permit coordination as part of our gas line installation and repair services. We pull the permit, perform the work, and coordinate the final inspection.
What causes gas line corrosion?
Older black iron and galvanized steel gas lines are susceptible to corrosion, especially in areas with high soil moisture, acidic soil, or where the protective coating has been damaged. Corrosion can cause pinhole leaks that are difficult to detect without pressure testing. Modern gas lines use corrugated stainless steel tubing (CSST) or coated steel pipe that is more corrosion-resistant.
How long do gas lines last?
Properly installed and maintained gas lines can last 50 years or more. However, older black iron pipe, galvanized fittings, and flexible connectors at appliances have a shorter lifespan and should be inspected periodically. If your home has original gas lines from the 1970s or earlier, a pressure test and inspection is a good investment.
What appliances can be connected to a gas line?
Gas lines can supply natural gas or propane to stoves and ranges, ovens, water heaters, furnaces, boilers, dryers, fireplaces and fire pits, outdoor grills, whole-home generators, and pool heaters. If you're adding a new gas appliance, we can run a new branch line from your existing gas supply.
How is a gas leak detected professionally?
We use two methods: pressure testing (pressurizing the gas line and monitoring for pressure drop) and electronic gas detection equipment that can pinpoint the location of a leak. We always pressure test after any gas line repair to verify the system is leak-free before restoring gas service.
What is CSST and is it safe?
CSST (corrugated stainless steel tubing) is a flexible gas piping system that is widely used in modern construction. It is safe when properly installed and bonded. Older CSST installations may lack proper bonding, which can create a lightning strike risk. If your home has CSST gas lines installed before 2010, we recommend having the bonding inspected.
Can I run a gas line for an outdoor grill or generator?
Yes — this is one of the most common gas line projects we do. We run a new branch line from your existing gas supply, install a shutoff valve, and connect to your outdoor grill, fire pit, or generator. This eliminates the need for propane tanks and provides a continuous gas supply.
What should I do if I suspect a gas leak?
Leave the building immediately. Do not turn any switches on or off, do not use your phone inside the building, and do not start any vehicles in an attached garage. Call your gas company and 911 from outside. Once the immediate danger is addressed and the gas company has shut off the supply, call Deep Dive Plumbing Maryland to locate and repair the leak.
Plumbing Learning Center
Guides written by our team for Southern Maryland homeowners.
Gas Line Service Areas
Deep Dive Plumbing Maryland installs and repairs gas lines throughout Southern Maryland. Terry Foster Jr. holds MD Master Plumber & Gas Fitter License #98433.
Need a Licensed Gas Fitter in Southern Maryland?
Deep Dive Plumbing Maryland is one of the few plumbing companies in Southern Maryland with a Licensed Master Plumber AND Gas Fitter on staff. Call now for a free estimate.
What Our Customers Are Saying
Real reviews from real Southern Maryland homeowners.
Savannah Foster
Southern Maryland
May 2026
"Absolutely blown away by the service from Deep Dive Plumbing Maryland! We had ongoing issues with our well water for years — bad smell, staining, and constant problems with pressure — and nobody ever took the time to truly figure out the root cause. Terry and the team came out, performed a full water analysis, explained everything in detail, and designed a system specifically for our home instead of just trying to sell us random equipment. You can really tell they care about doing things the right way. The install was extremely clean and professional, they walked us through how everything works, and our water has never looked or tasted better. The difference is unbelievable."
George Baker III
Annapolis, MD
May 2026
"We recently had Deep Dive Plumbing Maryland out to our home in Annapolis after we suddenly started noticing sewer flies throughout the house. They truly lived up to their name and performed a full "deep dive" diagnostic inspection instead of just treating the symptom. During their inspection they discovered our sewer pipe connected to the toilet had been leaking into the basement for quite some time. The team explained everything clearly, provided upfront pricing before starting any work, and even gave us a military discount which was greatly appreciated. They were professional, respectful, extremely knowledgeable, and took the time to make sure the repair was done correctly."
Jess
Local Guide
Southern Maryland
May 2026
"We had a mystery leak in our bathroom and everyone who saw it was convinced it was coming from inside the wall. He came out, checked everything, and was super thorough instead of just guessing. Turns out it was actually a leak from the toilet tank that was dripping in a way that made it look like it was coming from the opposite wall. He was super patient with all of our questions and explained the fix. We really appreciated his professionalism and transparency. Having an older home, it can be stressful not knowing what kind of repair you're walking into. I highly recommend him if you want someone trustworthy and knowledgeable who genuinely just wants to help."