Accurate, Code-Compliant Gas Inspections for Homes and Businesses Across Long Island, NY
Gas systems must be inspected by certified professionals — and NJM Mechanical & Contracting is one of the few providers on Long Island qualified with TASK 86/87 certification. We offer detailed gas inspections, pressure testing, leak detection, and full compliance evaluations to ensure your gas system is safe and operating according to local Nassau and Suffolk County regulations.
Whether required for a renovation, property sale, new appliance installation, or general safety, we provide thorough, reliable inspections you can trust.
Comprehensive evaluations of your entire gas system — including piping, valves, shut-off points, meters, and appliance connections — to ensure everything meets Long Island’s strict safety standards.
Using advanced detection tools and pressure testing methods, our TASK 86/87–certified technicians accurately identify leaks and verify the integrity of your system.
We inspect your gas system for compliance with Nassau and Suffolk County regulations and provide documentation required for renovations, property sales, insurance, or DOB approvals.
We verify safe operation and proper venting for boilers, furnaces, water heaters, stoves, dryers, fireplaces, and generators to prevent carbon monoxide and gas-related hazards.
Professional testing to confirm your gas system is stable, leak-free, and maintaining proper pressure levels according to required standards.
If you suspect a gas issue, our certified experts provide rapid response inspections to diagnose the problem and keep your property protected.
Expert Plumbing Solutions Backed
by Over 33 Years of Experience
Why Long Island homeowners and businesses trust NJM for gas inspections
Expert plumbing installations backed by licensed professionals and decades of hands-on experience.
Gas inspections require specialized certification — and our team meets all requirements to perform safe, compliant, and officially recognized inspections across Long Island.
Every inspection is supported or supervised by a licensed Master Plumber to ensure accuracy, compliance, and reliable system evaluations.
We are fully licensed and insured to perform gas inspections for both residential and commercial properties in Nassau and Suffolk County.
Our inspectors use professional-grade equipment to detect leaks, pressure drops, venting issues, and safety hazards that standard checks often miss.
With decades of experience, we understand Long Island’s specific code requirements, inspection standards, and common gas system issues.
Because gas work is directly connected to plumbing and appliance performance, NJM provides a seamless one-company solution — no need to hire 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.