Whole-House Filtration
Point-of-entry systems treating all the water entering the property, sized to the household’s flow rate.
Plumbing
Water Treatment & Filtration On Long Island
Filtration systems, softeners and whole-home water treatment installed by licensed Long Island plumbers. Cleaner water for homes and businesses across Nassau and Suffolk County.
FILTRATIONWATER SOFTENERSWHOLE-HOME SYSTEMSLICENSED
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
Water Treatment & Filtration On Long Island
Water treatment only works when it is aimed at an actual problem. Hardness, taste, odour, sediment and specific contaminants are different issues needing different equipment, and a softener does nothing for a taste complaint while a carbon filter does nothing about scale. The first useful step is establishing what is actually in your water rather than buying a system and hoping.
NJM installs and services water treatment and filtration for homes and businesses across Nassau and Suffolk County. Because we are plumbers rather than a water treatment sales operation, we have no reason to recommend a system you do not need — and where the complaint turns out to be corroding galvanized supply lines rather than the water supply itself, we will say so, because that is a repipe and not a filter.
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
What We Install
Water Treatment Services
Water Softeners
For hardness — scale on fixtures, spotting on glassware, soap that will not lather, and scale building inside water heaters and boilers.
Sediment Filtration
Removing particulate that clogs aerators, damages valves and shortens the life of appliances.
Carbon Filtration
For taste and odour complaints, which is a different problem from hardness and needs different equipment.
Point-Of-Use Systems
Under-sink filtration where the requirement is drinking water rather than treating the whole house.
System Servicing
Cartridge changes, media replacement and servicing, including systems we did not install.
Commercial Treatment
Systems for restaurants and businesses where water quality affects equipment life or the product.
Honest Diagnosis First
Working out what is actually wrong before recommending equipment. Sometimes the answer is that you do not need a system.
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.
What You Are Noticing
The Symptoms People Call Us About
Water problems announce themselves in the kitchen and the bathroom long before anyone tests anything. What you are seeing narrows down what is actually in the water.
Scale On Everything
White crust on fixtures and kettle elements, spots on glassware that will not wipe off, soap that never quite lathers. That is hardness — dissolved calcium and magnesium — and it is common across much of Long Island. It is a nuisance at the sink and a genuine cost inside a water heater.
Rusty Or Brown Water
Orange staining in the tub, brown water after the house has sat empty, laundry coming out marked. Usually iron, either dissolved in the supply or shedding from old galvanized pipe. Which one it is decides whether you need treatment or a repipe, and we do both.
A Rotten-Egg Smell
Sulfur smell from the taps. If it comes from the hot side only, it is often the water heater anode reacting rather than the supply, which is a water heater job rather than a filtration one. If it is on both hot and cold, it is in the water.
Chlorine Taste And Smell
Municipal supply is treated, and some houses taste it more than others. This one is genuinely a preference rather than a fault — but it is also among the easiest to fix, and it is usually why someone starts looking at filtration in the first place.
Blue-Green Staining
Blue-green marks around drains mean copper is dissolving into the water, which points at low pH rather than anything you can filter out at the tap. Left alone it eventually shows up as pinhole leaks in the copper itself.
Water Heaters Failing Early
A tank that fails well before it should has often been scaling up from the inside for years. Treating the water is what stops you replacing the next one on the same schedule. We install both, so we can tell you honestly which order to do them in.
Before You Buy Anything
Test First, Then Treat
Water treatment is the one plumbing category where it is genuinely easy to spend money on the wrong thing. A softener does nothing for a sulfur smell. A carbon filter does nothing for hardness. A whole-house system sized for a problem you do not have is an expensive way to change nothing.
So the first visit is diagnosis rather than a sales call: what the symptoms are, whether the supply is municipal or a private well, whether the problem is on the hot side only, and what a test actually shows. Only then is it worth talking about equipment.
It is also worth knowing when the answer is not treatment at all. Staining from failing galvanized pipe is a repipe. A sulfur smell on the hot side is a water heater. Blue-green marks are water chemistry attacking your copper. We hold the plumbing licence as well, so we can tell you it is not a filtration problem without losing the job.
Quick Rules Of Thumb
- Hardness, iron, sulfur and pH are four different problems with four different answers
- Hot-side-only symptoms usually point at the water heater, not the supply
- A private well and a municipal supply need different questions asked
- Treating the water is what stops the next water heater scaling up too
More Plumbing Services
Everything We Handle In Plumbing
One licensed team, one number to call, across Nassau and Suffolk County.
Current Offers
Money Off, Plainly Stated
What it says on the coupon is what comes off the bill. Mention it when you call.
$100 Off
Water Filtration System Installation
Sized to your water rather than to whatever is on the shelf.
Code NJM-FILTER100Expires October 31, 2026See the details →Maintenance PlansPlumbing Maintenance & Checks
Shutoffs that will not shut off, a water heater past its years, a supply line nobody has looked at. Preset or custom plans, for homes and for commercial properties.
Code NJM-PLUMBPLANNo expiryAsk us →$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-FIRST50Expires October 31, 2026See the details →Common Questions
Frequently Asked Questions
How do I know what kind of treatment I need?
By establishing what the actual problem is. Scale on fixtures and poor lathering point to hardness, which needs a softener. Taste or smell complaints need carbon filtration. Visible particles need sediment filtration. These are genuinely different problems, and a system aimed at the wrong one changes nothing — which is why testing before buying matters.
Does a water softener improve the taste of my water?
Not usually, and this is one of the most common misunderstandings. A softener addresses hardness minerals that cause scale and poor lathering. If the complaint is taste or odour, carbon filtration is the relevant equipment. Some households want both, for different reasons.
My water is discolored. Will a filter fix it?
It depends where the discoloration is coming from. If it appears mainly first thing in the morning or after the house has been empty, and it is rusty rather than cloudy, the likely cause is corroding galvanized supply pipe inside the house — not the incoming water supply. A filter will not fix that; a repipe will. We would rather tell you that than sell you a system that disappoints.
Will treatment protect my water heater and boiler?
Softening genuinely helps where hardness is the issue, because scale accumulates on heat exchange surfaces and makes equipment work harder and fail sooner. In a house with hard water and a high-efficiency boiler or tankless water heater, that protection is worth real money over the life of the equipment.
How often does a system need servicing?
It depends on the type and your usage — cartridge filters need changing on a schedule, softeners need salt and periodic servicing, and media beds need replacing eventually. We will tell you the actual interval for the equipment you have rather than a generic figure.
Can you service a system somebody else installed?
Yes. We service and repair existing water treatment equipment regardless of who fitted it.
Do you install systems for businesses?
Yes — restaurants and businesses where water quality affects equipment life or the product itself, sized for commercial flow rates rather than domestic ones.
Are estimates free?
Yes, free and with no obligation. Call 631-587-0085, or use the form and we will be in touch within 24 hours.
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
Need Water Treatment & Filtration?
Free estimates with no obligation, 24/7 emergency response, and 22+ years serving homes and businesses across Nassau and Suffolk County.