24/7 EMERGENCY SERVICE  ·  NASSAU & SUFFOLK COUNTY  ·  631-587-0085
Plumbing

Licensed Plumbing Services On Long Island

From a slow drain to a full repipe, NJM handles residential and commercial plumbing across Nassau and Suffolk County. Master Plumber on staff, licensed and insured, with 24/7 emergency response when a pipe will not wait.

LEAK DETECTIONWATER HEATERSGAS LINESCLOGS & BACKUPS
Licensed & Insured
Master Plumber
TASK 86/87 Certified
Navien NSS Certified
22+ YEARS ON LONG ISLAND

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LICENSED & INSURED · NASSAU & SUFFOLK
PLUMBING · HEATING · COOLING · CONTRACTING

Have An Emergency? We’re Available 24/7.

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STEP 1 OF 4 — WHAT DO YOU NEED?
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Plumbing

Licensed Plumbing For Long Island Homes & Businesses

Plumbing is the trade people call when something has already gone wrong, usually at an inconvenient hour. NJM has handled that call across Nassau and Suffolk County since 2004 — leaks, clogs, water heaters, gas lines, full repipes and commercial work — with a licensed Master Plumber on staff and technicians who answer the phone around the clock.

Long Island housing stock creates its own pattern of problems. Post-war Capes and ranches with original galvanized supply lines, cast iron waste stacks reaching the end of their service life, and additions plumbed by whoever was cheapest at the time. We work on these houses every week, which means we usually know what we are looking at before the wall comes open.

24/7 Emergency ServiceLicensed & Insured
  • Master PlumberLicensed to pull permits
  • TASK 86/87Certified for gas work
  • Navien NSSFactory-trained on tankless

22+ years on Long Island · Plumbing, heating, cooling, gas and contracting under one roof

More Plumbing Services

Everything We Handle In Plumbing

One licensed team, one number to call, across Nassau and Suffolk County.

PVC drain, waste and vent rough-in run between floor joistsPLUMBING

Plumbing Installations & Replacements

Licensed plumbing installations & replacements for Long Island homes & businesses. Fixtures, repiping, water lines & more across Nassau & Suffolk County.

  • FIXTURES
  • REPIPING
  • WATER LINES
  • LICENSED & INSURED
Installations & Replacements
Plumbing Leak Detection & Repair by NJM Mechanical & Contracting on Long IslandPLUMBING

Plumbing Leak Detection & Repair

Fast leak detection & repair across Nassau & Suffolk County. Advanced equipment, no unnecessary demolition. Licensed Long Island plumbers, 24/7 service.

  • HIDDEN LEAKS
  • NO GUESSWORK
  • SAME-DAY SERVICE
  • 24/7 EMERGENCY
Leak Detection & Repair
Plumbing Clogs & Backup Services by NJM Mechanical & Contracting on Long IslandPLUMBING

Plumbing Clogs & Backup Services

Clogged drains or sewer backups? NJM clears clogs fast across Nassau & Suffolk County. Licensed Long Island plumbers, 24/7 emergency response.

  • CLOGGED DRAINS
  • SEWER BACKUPS
  • RESIDENTIAL
  • COMMERCIAL
Clogs & Backup Services
Wall-hung condensing combi unit with copper manifold and thermal expansion tankPLUMBING

Water Heater Installation & Replacement

Tankless, gas & electric water heater installation & replacement on Long Island. Navien NSS certified. Free estimates across Nassau & Suffolk County.

  • TANKLESS
  • GAS & ELECTRIC
  • NAVIEN NSS CERTIFIED
  • FREE ESTIMATES
Water Heater Installation
Water Treatment & Filtration Services by NJM Mechanical & Contracting on Long IslandPLUMBING

Water Treatment & Filtration Services

Cleaner, safer water for Long Island homes & businesses. NJM installs water filtration, softeners & treatment systems across Nassau & Suffolk County.

  • FILTRATION
  • WATER SOFTENERS
  • WHOLE-HOME SYSTEMS
  • LICENSED
Water Treatment & Filtration
Commercial Plumbing by NJM Mechanical & Contracting on Long IslandPLUMBING

Commercial Plumbing

Licensed commercial plumbing for Long Island offices, restaurants, retail & multi-family properties. Installations, repairs & 24/7 emergency service.

  • OFFICES & RETAIL
  • RESTAURANTS
  • MULTI-FAMILY
  • 24/7 EMERGENCY
Commercial Plumbing
Gas Line Repairs & Installations by NJM Mechanical & Contracting on Long IslandPLUMBING

Gas Line Repairs & Installations

TASK 86/87 certified gas line repair, installation & leak detection on Long Island. Licensed, insured & 24/7 emergency response across Nassau & Suffolk.

  • TASK 86/87 CERTIFIED
  • LEAK DETECTION
  • CODE COMPLIANT
  • 24/7 EMERGENCY
Gas Line Repairs & Installations
Gas Inspection Services by NJM Mechanical & Contracting on Long IslandPLUMBING

Gas Inspection Services

TASK 86/87 certified gas inspections for Long Island homes & businesses. Pressure testing, leak detection & code compliance across Nassau & Suffolk.

  • TASK 86/87 CERTIFIED
  • PRESSURE TESTING
  • CODE COMPLIANCE
  • LICENSED
Gas Inspection Services
Plumbing — before you call

Two kinds of visit. You’ll know which before we come.

We don’t charge to quote a job. We do charge to find a problem nobody has identified yet. Which one you need — and what it costs — gets agreed on the phone, so nothing about the cost is a surprise on the doorstep.

Estimate visitNo charge

You already know what you want done

A boiler replaced, a bathroom rebuilt, a gas line run. We come out, look at the job and give you a number.

No obligation
Diagnostic visitQuoted on the call

Something has failed and nobody knows why

A licensed technician and the time to find what has actually gone wrong. One rate across plumbing, heating, cooling and gas, and one number to reach us on — there is no separate line to find at midnight. You get the figure before anyone is dispatched, and after-hours, weekend and holiday work is quoted the same way.

The rate you are told is the rate

You get the number on the phone, before anyone is dispatched, and it is what you are charged when the technician arrives. One rate across all four trades — plumbing, heating, cooling and gas.

What it pays for

A licensed, insured technician carrying the certifications the work needs, and the time to find what has actually failed — not a quick look and a guess.

Watch for the bait and switch

A call-out advertised at almost nothing gets recovered once someone is standing in your basement. Get the number before anyone travels — from us, or from anyone else you call — and hold them to it when they arrive.

Financing on larger jobs

A boiler that fails in January is not a purchase anyone planned. Financing is available on the big-ticket work, so a system replacement does not have to come out of savings in one go.

What it is normally used for

Boiler, furnace and water heater replacement, a full air conditioning system, a whole-house repipe, sewer and water main work, and larger contracting jobs — kitchens, bathrooms, dormers and extensions.

When to bring it up

At the estimate, before anything is scheduled. It is worth asking even if you think you will not need it, because knowing it is there changes what you are willing to consider fixing properly.

What it does not change

The price of the job. The quote is the quote whether you finance it or not — and on a straightforward repair it is usually not worth the paperwork. We will tell you which one you are looking at.

Financing provided throughSynchronyCredit is extended by Synchrony. Subject to credit approval.
Call 631-587-0085Not sure which one you need? Call and describe it — we will tell you before we book anything.
Narrowing It Down

One Fixture, Or The Whole House?

Two questions sort most plumbing problems into the right half of the trade before anyone opens a wall — and they are worth answering before you call, because they change who we send and what goes on the truck.

First: is water not arriving, or is it not leaving? Those are two different systems that happen to meet at your fixtures. Weak pressure, discoloured water, no hot water, a bill that jumped — that is the supply side, the pipework bringing water in under pressure. Slow drains, gurgling, backing up, smells — that is the drain and waste side, which moves water out under gravity. A plumber who arrives knowing which half it is starts an hour ahead.

Second: is it one fixture or all of them? One slow sink is almost always a local blockage in that fixture trap or branch. Every drain in the house running slow at once, or the lowest one backing up when you use an upstairs one, points at the main line — the house drain, the sewer lateral or, on the unsewered blocks, the cesspool. Same on the supply side: one weak tap is usually that fixture aerator or angle stop, while pressure down everywhere points at the service line, the main, or piping that has narrowed over decades.

Those two answers between them tell you most of what a first visit would establish. A single slow drain is a different job, a different price and a different urgency from a main line backing up, and it is worth knowing which conversation you are having.

And a note on what not to do while you wait. If a drain is backing up, stop running water into it — a washing machine or dishwasher discharging into a blocked main is how a slow drain becomes a flooded floor. If water is coming out somewhere it should not, shut the main off before anything else. Chemical drain cleaner is the one we would ask you to skip: on a main line it rarely reaches the blockage, and it means whoever opens that pipe is opening a pipe full of caustic.

Quick Rules Of Thumb

  • Water not arriving — pressure, temperature, discolouration — is the supply side
  • Water not leaving — slow, gurgling, backing up, smells — is the drain side
  • One fixture affected: usually local, at that trap, aerator or branch
  • Everything affected: the main line, the service, or the house drain
  • Lowest drain backing up when an upstairs one runs: main line, treat as urgent
  • Backing up? Stop running water into it, and skip the chemical cleaner
Talk It Through — 631-587-0085
Common Questions

Frequently Asked Questions

How do I tell a supply problem from a drain problem?

By whether water is failing to arrive or failing to leave. Pressure that has dropped, water that runs discoloured, no hot water, a bill that jumped with no change in use — those are supply-side, the pressurised pipework bringing water in. Slow drains, gurgling, anything backing up, drain smells — those are the waste side, which moves water out under gravity. They are two different systems that only meet at your fixtures, and knowing which one you are describing is genuinely useful on the phone.

Only one drain is slow. Is that the same as the whole house being slow?

No, and the difference matters. A single slow fixture is nearly always a local blockage in that trap or the branch behind it — a contained job. Every drain slow at once, or the lowest drain in the house backing up when you run something upstairs, points at the main line: the house drain, the sewer lateral, or on the unsewered blocks the cesspool. That second one is urgent, because the next thing that discharges into it comes back up through the lowest fixture.

Should I use a chemical drain cleaner first?

We would rather you did not. On a main line it rarely reaches the blockage, because the blockage is well beyond where the liquid stalls. What it does reliably do is mean that whoever opens the pipe is opening a pipe full of caustic, and it can attack older pipe while it sits there. If a drain is backing up, the useful thing is to stop running water into it — a washing machine or dishwasher discharging into a blocked main is how a slow drain becomes a flooded floor — and then call.

Does one company handle the plumbing and the repair to the wall afterward?

Ours does, and on plumbing work that matters more than on most trades, because getting to the pipe often means opening something. When the plumbing sits with one company and the making-good sits with another, the job stops at the point the pipe is fixed and the room stays unfinished until somebody else has an opening. Plumbing, heating, cooling, gas and general contracting are all our own licensed team, so the wall goes back as part of the same job.

Do you have a licensed Master Plumber on staff?

Yes. NJM holds Master Plumber certification, which is what allows us to take on every category of plumbing work across Nassau and Suffolk County rather than only the simple jobs. We are also TASK 86/87 certified for gas work and fully licensed and insured.

Do you handle emergency plumbing?

Yes, without qualification — 24 hours a day, every day of the year, including nights, weekends and holidays. Burst pipes, sewer backups and failed water heaters are the calls that cannot wait, and someone answers. Regular office hours are Monday through Friday 7:00 AM to 6:00 PM and Saturday 7:00 AM to 5:00 PM.

My water bill jumped but I cannot see a leak. What now?

A sudden jump with no visible cause usually means a leak behind a finish, under a slab or in an underground service line. Turn off every fixture and watch the water meter — if it is still moving, water is going somewhere. That is the point to call, because hidden leaks cause structural damage long before they surface.

Do you work on older Long Island homes?

Constantly. Post-war Capes and ranches across Nassau and Suffolk have galvanized supply lines and cast iron waste stacks that eventually need replacing, along with additions plumbed to a standard that would not pass today. We work on these houses every week.

Can you handle gas line work?

Yes. NJM is TASK 86/87 certified, which is the certification New York requires for legal gas work. That covers new gas lines for ranges, dryers, generators and heating equipment, plus leak detection, pressure testing and the code compliance paperwork.

Do you do commercial plumbing?

Yes — offices, restaurants, retail spaces and multi-family properties across Long Island. Commercial jobs get the same licensed crew and the same response times, scheduled around your operating hours where we can.

Do you charge a service call fee?

Yes, for diagnostic visits — where something has failed and nobody knows why yet. It buys a licensed technician's time to find what has actually gone wrong, and it is one rate across plumbing, heating, cooling and gas. We give you the figure on the phone, before anyone is dispatched, and after-hours, weekend and holiday calls are quoted the same way. Estimates for new installations and renovation work are free.

What areas do you cover?

All of Nassau County and all of Suffolk County, from our base in North Babylon. Babylon, West Babylon, Lindenhurst and Deer Park are on our doorstep; we work west into Massapequa, Farmingdale and Hicksville and north through Commack and Dix Hills. That list is where we get asked about most, not where we stop. Call 631-587-0085 if you are not sure whether you are in range.

Are estimates free?

Yes, free and with no obligation. Tell us what is happening and we will give you a straight number. Send it through the form and we will be in touch within 24 hours, or call 631-587-0085 for anything urgent — that line is answered around the clock.

Service Area

Proudly Serving Long Island and Surrounding Areas.

Based in North Babylon, working across both counties — close enough to get there fast, local enough to know the housing stock and the permit offices.

Find Plumbing Services Near You!

  • Long Island
  • Nassau County
  • Suffolk County

Towns We Serve

Proudly serving all of Nassau and Suffolk County, with deep local roots near our North Babylon home base.

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What Long Island Says

Reviews From Homes & Businesses We've Served

5 out of 5 stars

Called Neil on the spur of the moment on a Saturday afternoon because my bathroom sink backed up and when I plunged it nothing but black water came up. I really opened up Pandora's box. Neil was able to come same day and fix the problem. Glad I had his number handy.

Patricia NollJune 2026
Reviewed on Google

5 out of 5 stars

As always, Neil is a pleasure to have as my plumber. He is so professional and knowledgeable. I wouldn't use anyone else! I highly, highly recommend him.

Fritzi R.May 2026
Reviewed on Housecall Pro

5 out of 5 stars

Most recently, Neil came to my house to look at an issue I was having with the plumbing of my pool heater. Despite being very busy, he squeezed my job in. This morning he came by early to give everything a test. No surprise, it works perfectly. Thank you Neil!!!

Edward AndersonMay 2026
Reviewed on Google

Read all 87 reviews from Google and Housecall Pro →

Need A Licensed Plumber On Long Island?

Free estimates with no obligation, 24/7 emergency response, and 22+ years serving homes and businesses across Nassau and Suffolk County.

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