Plumbing Services on Long Island, NY
Reliable, licensed, and professional plumbing experts serving Nassau and Suffolk County. From leaks and clogs to full plumbing installations, NJM delivers trusted solutions that keep your home or business running smoothly.
Available 24/7 For Emergency Plumbing Service
Trusted Plumbing Experts for Nassau and Suffolk County
Licensed plumbing professionals with over 33 years of experience serving residential and commercial properties across Long Island.
NJM provides expert plumbing installations and replacements for homes and businesses across Long Island, NY. From new fixtures to complete piping systems, our licensed plumbers ensure lasting quality and precision on every project.
Stop hidden leaks before they cause costly damage. Our specialists use advanced leak detection technology to find and repair plumbing issues quickly — serving Nassau and Suffolk County with reliable, 24/7 service.
From kitchen sinks to main sewer lines, NJM clears clogs and backups safely and efficiently. Our experts use professional-grade equipment to get your plumbing flowing again — available across Nassau and Suffolk County.
Enjoy consistent hot water with NJM’s water heater installation and replacement services. We handle all types of systems — tankless, electric, and gas — providing expert service across Long Island, NY.
Keep your property safe with professional gas line repair and installation from NJM. We’re certified to handle gas piping, appliance connections, and safety inspections throughout Long Island, NY.
Protect your home or business with NJM’s licensed gas inspection services. We provide thorough safety checks and compliance testing to ensure your gas systems meet all local Long Island codes and regulations.
NJM provides professional commercial plumbing services for offices, restaurants, and retail spaces throughout Nassau and Suffolk County. We handle everything from new builds to maintenance with precision and reliability.
When a plumbing emergency strikes, NJM is ready to respond — day or night. Our 24/7 plumbing team serves all of Long Island, delivering fast, dependable solutions to restore your water and prevent further damage.
Improve your home’s water quality with NJM’s water filtration and treatment solutions. From hard water issues to contaminant removal, our systems deliver cleaner, safer water for Long Island homes and businesses.
Expert Plumbing Solutions Backed
by Over 33 Years of Experience
Why Long Island Homeowners Trust NJM for Master Plumbing Services
With decades of experience and multiple Master Plumber licenses, NJM delivers safe, compliant, and reliable gas line and plumbing work across Long Island.
Certified professionals handling every inspection, installation, and repair safely and correctly.
Multiple Master Plumber licenses across Nassau & Suffolk ensure code compliance and expert-level workmanship.
Fully certified to handle gas line safety, repairs, and installations to the highest industry standards.
Whether it's a burst pipe or a clogged drain, our team is ready to assist, any time of day or night.
Serving Long Island since 1991 with proven reliability and technical expertise.
Upfront quotes, no hidden fees, and clear explanations for every service.
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.