Professional Gas Line Repair & Installation on Long Island, NY
Safe, code-compliant gas line services for homes and businesses across Nassau and Suffolk County — performed by certified technicians you can trust.
Need help right away? Contact our licensed team for fast, reliable service — available 24/7.
Safe, Certified Gas Line Solutions for Homes and Businesses On Long Island, NY
NJM Mechanical & Contracting provides expert gas line repair and installation services across Long Island, NY. Our TASK-86/87 certified technicians ensure every gas line is installed, repaired, or replaced to meet strict local codes and safety standards. Whether you’re updating appliances, running a new gas line, or addressing a potential leak, we deliver precise, compliant work to keep your home or business protected.
Restore safety and proper operation with expert gas line repairs completed by TASK 86/87–certified technicians. We quickly diagnose issues, fix damage, and ensure your system meets Long Island code requirements.
Whether you’re adding new appliances or expanding your system, our licensed team provides code-compliant gas line installations for homes and businesses. All work is performed by TASK 86/87–certified professionals to ensure safe, long-lasting results.
Using advanced detection equipment, we locate leaks with precision and make immediate repairs to secure your property. Our TASK 86/87 certification ensures all corrective work is performed safely and to regulatory standards.
We professionally connect gas-powered appliances — including stoves, dryers, boilers, water heaters, and generators — with proper piping, pressure testing, and safety verification.
Replace aging, corroded, or unsafe gas lines with modern, code-compliant piping installed by our certified team. We upgrade outdated systems to improve performance and eliminate safety hazards.
From gas grills to pool heaters and patio heaters, we install exterior lines built to withstand outdoor conditions. Our TASK-certified technicians ensure proper routing, secure fittings, and full compliance with Long Island regulations.
Expert Plumbing Solutions Backed
by Over 33 Years of Experience
Why Long Island homeowners and businesses trust NJM for gas line work
Expert plumbing installations backed by licensed professionals and decades of hands-on experience.
Gas work requires specialized certification, and our team is fully TASK 86/87 certified to perform safe, code-compliant gas piping, testing, and installations throughout Nassau and Suffolk County.
Every gas line installation or repair is supervised by a licensed Master Plumber to ensure accuracy, safety, and proper system performance.
NJM is fully licensed and insured to perform gas line repairs, replacements, and installations for both residential and commercial properties.
We use modern testing methods and equipment to accurately locate leaks, assess system integrity, and perform corrective work with precision.
With decades of experience across Long Island, we understand local code requirements, property layouts, and safety expectations for gas systems.
Because gas work is directly tied to plumbing systems, NJM offers everything under one roof — eliminating the need to coordinate multiple contractors.
Water Heater & Boiler Safety Testing
Assessment of temperature controls, pressure relief valves, gas/water connections, and venting to prevent hazards and improve efficiency.
Fixture & Appliance Safety Checks
Inspection of water heaters, boilers, valves, shut-offs, and plumbing fixtures to ensure proper operation and safe performance.
Leak Detection & Line Evaluation
We use advanced diagnostic tools to locate leaks, pressure issues, corrosion, and worn components before they evolve into major problems.
Emergency Shut-Off Valve Testing
Ensuring all plumbing shut-off valves function properly in the event of leaks or system failures.
Drain, Vent & Pipe System Assessment
A full review of your home’s plumbing infrastructure — drains, vents, supply lines, and connections — to ensure proper flow and system health.
Code Compliance Review
We verify that your plumbing system meets all Long Island, Nassau, and Suffolk County regulations — essential for renovations, additions, or property sales.
Trusted Plumbing Expertise for Long Island Homes & Businesses
Our Plumbing Safety & Inspection Services Include:
NJM provides advanced inspection, leak detection, and safety evaluations to keep your plumbing system running efficiently, safely, and fully compliant with local codes.
Find HVAC Services Near You!
Service Area Links:
- Long Island
- Nassau County
- Suffolk County
What Our Long Island Clients Are Saying...
Kris
I couldn’t recommend Neil enough! From start to finish him and his team were professional, efficient and experienced. We had a job pulling up rocks and putting top soil down which I know can be a tedious job. We appreciate the work and look
Evelyn Powers
We had an ongoing issue with clogs. My daughter woke up to flooding in her bedroom from her toilet, which was not fun! This was our first time having NJM in our home. Neil was knowledgeable and gave us several options. we chose to have him use the camera to get to the root of the problem. He was able to pinpoint several issues and was able to fix clog and clean out the pipes. Neil and his crew were very professional,
Irene Cheung
I contacted NJM Mechanical because I didn’t have hot water anywhere in my house. Neil was able to diagnose the issue and get to work. My navien tankless water heater is only a year old and still under warranty. Instead of waiting on Navien to send the part so the issue can be corrected, Neil went out, found the part, purchased it,
William Lo
Great experience. Neil came out and took the time to explain everything thoroughly. He was able to fix all the errors on our Navien and have it back up and running. Following up a week later. Neil and Mike came out to redo the Navien system for proper instillation.
Unfortunatley, after there was a gas leak with our Navien system. Neil was able to get
James Farnworth
Neil from NJM was able to get my ac system up and running when others could not. He was honest with me right from the beginning and all costs were discussed before repairs began. Additionally, Neil spent time explaining to me how my system operates and the things I could do to help it run at peak performance. It was quite refreshing to experience a service technician who demonstrated the uppermost
Raul Chardon
Honest professional full of knowledge not BS. Takes pride in his craft and is a master of it.