Water Filtration & Treatment Services on Long Island

You deserve clean, great-tasting water straight from the tap. At AJ Services, we provide expert water treatment and filtration solutions to help Long Island homeowners improve water quality, protect their plumbing systems, and enjoy peace of mind with every glass.

From whole-house filters to reverse osmosis systems and water softeners, our team offers tailored solutions backed by over 20 years of plumbing expertise. Whether you’re worried about contaminants or tired of hard water buildup, we’ll help you find the right system and install it the right way.

water filtration system installation

Why Water Quality Matters

Health & Safety: Water should never be a question mark. Our filtration systems reduce or eliminate chlorine, lead, sediment, PFAS, and other common contaminants found in municipal and well water.
Taste & Odor: If your tap water tastes metallic, musty, or just “off,” it’s likely due to excess minerals or chemical additives. We’ll help you fix that—and actually enjoy drinking water again.
Appliance & Plumbing Protection: Hard water can shorten the life of dishwashers, washing machines, and water heaters. It leaves behind mineral deposits that damage pipes and reduce efficiency. Softening and filtration can prevent expensive repairs down the line.

Our Water Treatment Services

Whole-House Filtration Systems

These systems filter all the water entering your home, delivering cleaner water to every faucet, shower, and appliance. Ideal for families and anyone who wants complete home coverage.

Reverse Osmosis (RO) Systems

RO systems provide ultra-pure drinking water by removing up to 99% of contaminants. We install under-sink and inline units for kitchens, refrigerators, and more.

Water Softeners

If you're battling soap scum, itchy skin, or calcified fixtures, a water softener can fix it. We’ll recommend and install the right model for your water usage and space.

Maintenance & Repairs

Already have a system? We offer maintenance plans, filter replacements, and repair services to keep it running clean and efficiently.

Custom Water Solutions for Every Home

Free Water Testing & System Recommendations: We’ll start with a test to see what’s really in your water, then recommend the best solution—no generic sales pitch, just what fits your needs.
Licensed Installation & Upgrades: Our licensed plumbers install every system with precision and care. No subcontractors. No shortcuts.
Ongoing Support & Filter Replacements: We’ll keep track of your maintenance schedule, notify you when filters are due, and make sure your system performs at its best, year after year.
photo of Ben the lead Master Plumber in Bellmore

Serving Nassau & Suffolk with 24/7 Emergency Plumbing

From our headquarters in Bellmore, AJ Services provides water treatment services throughout Long Island—including Massapequa, Garden City, Huntington, Hempstead, Patchogue, Babylon, and surrounding towns.

No matter where you’re located, we’re here to help you enjoy cleaner, safer water at home.

Get Cleaner, Safer Water Today

Don’t settle for bad taste, mineral buildup, or questionable tap quality. Contact AJ Services today to schedule your free water test and get expert recommendations on the best filtration system for your home.

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Service Areas

Amityville
Atlantic Beach
Babylon
Baldwin
Bay Shore
Bayport
Bayville
Bellmore
Bethpage
Blue Point
Bohemia
Brentwood
Brightwaters
Brookville
Cedarhurst
Centerport
Cold Spring Harbor
Commack
Coram
Deer Park
Dix Hills
East Hills
East Islip
East Meadow
East Northport
East Rockaway
Elmont
Farmingdale
Farmingville
Floral Park
Franklin Square
Freeport
Garden City
Garden City Park
Glen Cove
Glen Head
Glen Neck
Great River
Greenlawn
Hauppauge
Hempstead
Hewlett
Hicksville
Holbrook
Holtsville
Huntington
Huntington Station
Inwood
Islandia
Island Park
Islip
Jericho
Kings Park
Lake Grove
Lake Success
Laurel Hollow
Lawrence
Levittown
Lido Beach
Lindenhurst
Lloyd Harbor
Locust Valley
Long Beach
Lynbrook
Malverne
Manhasset
Massapequa
Medford
Melville
Merrick
Mineola
Muttontown
Nesconset
New Hyde Park
Nissequogue
North Babylon
North Bellmore
Oakdale
Oceanside
Old Bethpage
Old Brookville
Old Westbury
Oyster Bay
Patchogue
Plainedge
Plainview
Point Lookout
Port Jefferson
Port Jefferson Station
Port Washington
Ronkonkoma
Roosevelt
Roslyn
Roslyn Heights
Sands Point
Sayville
Sea Cliff
Seaford
Setauket
Smithtown
St. James
Stony Brook
Syosset
Uniondale
Valley Stream
Wantagh
West Babylon
West Westbury
West Hempstead
West Islip
Wheatley Heights
Woodbury
Woodmere