Runs Constantly
Pumping when it has not rained, or never shutting off. Usually a stuck float switch or a failed check valve, and a motor wearing itself out.
Plumbing
Sump Pump Installation & Replacement On Long Island
The worst time to find out a sump pump has quit is in the middle of a storm with water rising in the basement. NJM installs and replaces pumps, adds battery backups, and fixes where the water gets in, across Nassau and Suffolk County. Flooding calls answered 24/7.
SUMP PUMPSBATTERY BACKUPSWATERPROOFING24/7 EMERGENCY
Licensed & Insured
Master Plumber
TASK 86/87 Certified
Navien NSS Certified
22+ YEARS ON LONG ISLANDGet Your Free Estimate
LICENSED & INSURED · NASSAU & SUFFOLK
PLUMBING · HEATING · COOLING · CONTRACTING
Have An Emergency? We’re Available 24/7.
631-587-0085WE ANSWER EVERY CALLPlumbing
Find Out Before The Storm Does
A sump pump sits quietly in the basement for months and then has one job on the worst night of the year. When it fails, it fails at exactly the moment the water is rising, and a finished basement pays for it.
NJM installs and replaces sump pumps for homes and businesses across Nassau and Suffolk County, digs new pits where there has never been one, adds battery backups, and answers basement-flooding calls 24 hours a day. And because we also do the waterproofing, the foundation work and the rebuild, the whole wet-basement problem stays with one team.
24/7Flooding Calls Answered
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
Warning Signs
Signs Your Sump Pump Is About To Quit
Most pumps give a warning first. These are the ones worth acting on before the next storm.
Never Seems To Run
Silent through a downpour. Pour a bucket of water into the pit: if the pump does not start now, it will not start in a storm either.
Grinding Or Rattling
Worn bearings or debris in the impeller. A pump that sounds like that is on borrowed time.
Damp Floor Around The Pit
Water around the basin after rain means the pump is not keeping up, or not running at all.
An Old Pump
Sump pumps do not last forever, and older ones tend to fail without warning. Replacing one before the season beats replacing it during a storm.
Silt Or Debris In The Pit
A pit full of silt, gravel or rust jams the float and clogs the intake.
Discharge Line Trouble
Water running back into the pit, or a frozen or crushed outdoor line, means the pump is working hard for nothing.
Basement Flooding Now
Water rising in the basement. Keep clear of anything electrical in standing water and call 631-587-0085, 24 hours a day.
What We Do
Sump Pumps, Backups And Dry Basements
Sump Pump Replacement
Failed or failing pumps replaced with the right new pump, set, connected and tested with water before we leave.
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.
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.
Straight answers, no upsellStraight Answer
Repair The Pump, Or Replace It?
A sump pump is a sealed motor sitting in a pit of water, so most of the time the honest answer is replacement, not repair. But a stuck float, a jammed intake or a bad check valve can be fixed, and if that is all it is, that is what we will do.
If the motor is going, replace it before the storm finds out for you. And if the pump keeps failing, or simply cannot keep up, a bigger pump is rarely the fix. We find out why: a silted pit, a discharge line running back, or water coming through the foundation. Then we fix that with a battery backup, waterproofing or foundation work, so the new pump is not the next one to quit.
- Stuck float or bad check valve: fix it
- Failing motor: replace it before the season
- Pump keeps dying or cannot keep up: fix the cause
- Power goes out in storms: add a battery backup
- Water in the basement now: call 631-587-0085
Fall Specials
Money Off, Plainly Stated
What it says on the coupon is what comes off the bill. Mention it when you call.
$50 Off
Sump Pump Replacement
The time to find out a sump pump has failed is not during the storm.
Code NJM-SUMP50Fall Special · valid through November 30, 2026See the details →$50 OffYour First Service Call
New to NJM? Fifty dollars off the first time we come out — one licensed team for plumbing, heating, cooling and gas.
Code NJM-FIRST50Fall Special · valid through November 30, 2026See the details →Common Questions
Straight Answers
Still not sure what you are dealing with? Call and talk to a licensed plumber, 24 hours a day.
631-587-0085Free Estimate →How do I test my sump pump?
Lift the lid and slowly pour a bucket of water into the pit. The float should rise, the pump should start, empty the pit and shut off. If it hums without pumping, runs without stopping, or does nothing, call 631-587-0085.
My basement is flooding right now. Can you come out?
Call 631-587-0085. The line is answered 24 hours a day, every day of the year. Keep clear of anything electrical in standing water while you wait.
Should I repair my sump pump or replace it?
Usually replace. A sump pump is a sealed motor, so a failing one is rarely worth rebuilding. A stuck float, a jammed intake or a bad check valve can be fixed, and we will tell you which one you have.
Can you install a sump pump where there has never been one?
Yes. We cut the basement floor, dig the pit, install the pump and run the discharge line out of the house. Call 631-587-0085 for a free estimate.
Do I need a battery backup sump pump?
If your basement has ever flooded, or the power on your street goes out in storms, yes. The main pump stops the moment the power does, which is usually the worst moment. A battery backup keeps the water moving until it comes back.
My pump runs all the time and the basement still gets wet. Is it the pump?
Often not. If water is coming in faster than a working pump can clear it, the fix is where it gets in. NJM does basement waterproofing and foundation repair as well, so one visit finds the cause and one team fixes it.
Can you fix the basement after water damage?
Yes. NJM is also a general contractor, so the drywall, flooring and finishes are put back by our own team rather than a second company.
Are estimates free?
Yes, free and with no obligation. Call 631-587-0085, or use the form on this page and we will be in touch within 24 hours.
More Plumbing Services
Everything We Handle In Plumbing
One licensed team, one number to call, across Nassau and Suffolk County.
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
- North Babylon
- Babylon
- West Babylon
- Deer Park
- Lindenhurst
- Farmingdale
- Massapequa
- Hicksville
- Dix Hills
- Commack
- Islip
- Hempstead
- North Hempstead
- Rockville Centre
Proudly serving all of Nassau and Suffolk County, with deep local roots near our North Babylon home base.
Get A Free EstimateWhat 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
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
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
Test It Now, Not In The Storm.
Sump pumps, new pits, battery backups, waterproofing and foundation work for homes and businesses across Nassau and Suffolk County. Flooding calls answered 24/7 at 631-587-0085.