All Island PlumbingMassapequa, NY · Nassau & Suffolk

Serving Greenlawn · ZIP 11721, 11740, 11743

Plumber in Greenlawn, NYEmergency Plumbing, Drains, Gas Lines & Water Heaters

All Island Plumbing, Heating & Cooling is a plumbing company at 5788 Merrick Rd, Suite 203, Massapequa, NY 11758, serving Greenlawn (ZIP 11721, 11740, 11743) in the Town of Huntington, Suffolk County. Call (631) 644-2084. We answer calls 24/7 and are open Monday through Saturday (closed Sunday).

Call now(631) 644-2084 Book online Answering calls 24/7 · Open Mon–Sat, closed Sunday

Smell gas? Leave the house first, then call the gas utility's emergency line or 911.

Call for service

Tap the button to call from your phone.

Call (631) 644-2084 Book online

Online requests are coming soon. For now, calling is the fastest way to reach us.

  • Local office · Merrick Rd, Massapequa
  • Nassau County & western Suffolk
  • Licensed & insured across Long Island
  • Answering calls 24/7 · Open Mon–Sat, closed Sunday

Local to Greenlawn

Based on Merrick Road, serving Greenlawn

Greenlawn is a hamlet in the Town of Huntington, about 29 minutes from our office without traffic (estimate). 43% of its homes were built before 1960, most homes are on cesspools or septic systems, and FEMA maps little or none of it in the high-risk flood zone.

What we fix

Plumbing services in Greenlawn

Plumbing only. Don't see your problem? Call and ask.

Emergency Plumber

Burst pipes, active leaks, overflowing fixtures.

Burst Pipe Repair

Split, burst or frozen pipes located and repaired.

Drain Cleaning

Kitchen, bath, laundry and main lines.

Sewer Line Repair & Hookups

Roots and breaks in the line from the house to the cesspool or septic tank. We don't do cesspool work.

Backwater Valve Installation

For homes on a public sewer: a check valve on the house line that closes if the street sewer backs up, so sewage can't come in through basement drains.

Water Heater Repair & Installation

Tank-type, gas and electric.

Leak Detection & Repair

Hidden supply leaks, wet ceilings, unexplained high water bills.

Gas Line Installation & Repair

Oil-to-gas switches, ranges, dryers and gas water heaters.

Bathroom & Kitchen Plumbing

Fixtures and remodel plumbing.

Water Filtration

Whole-house and under-sink systems sized to your water report.

Septic Line Clearing

We clear the line from the house to an existing septic tank. We don't install septic systems, and we don't do cesspool work.

Local know-how

Greenlawn homes & plumbing: what we see

Real numbers from public sources, and what they mean for your pipes.

43%
of homes built before 1960
Source: Census ACS 2024 5-yr, B25034
1963
median year homes were built
Source: Census ACS 2024 5-yr, B25035
37%
of homes heat with fuel oil
Source: Census ACS 2024 5-yr, B25040
85%
single-family detached houses
Source: Census ACS 2024 5-yr, B25024

Old Fields, renamed for the railroad.

Wikipedia says the area was known as Old Fields until the Long Island Rail Road's 1871 expansion; the railroad picked the name Greenlawn for its station. The hamlet was known for pickle production in the 19th century, along with potatoes and cabbage. The CDP covers 3.7 square miles, all land, with ZIP 11740 at its post office.

The Census Bureau's latest five-year survey counts about 4,700 homes, with a median year built of 1963. 30% went up in the 1950s, 9% before 1940, and 15% after 1980. 85% are single-family detached houses, and 83% are owner-occupied.

So a typical house here has drain and water lines around 63 years old unless they've been replaced. Slow drains in several fixtures, a gurgling floor drain or rusty water from one tap are signs to have the main line and supply piping checked.

Oil to gas means new gas piping.

The ACS shows 50% of homes heat with utility gas and 37% with fuel oil. Switching means properly sized gas piping to the new equipment, and often to the water heater, range and dryer. We do the gas line work. We don't sell or deliver oil.

Cesspools and septic, mostly.

Laying Suffolk County's sewer-district map over the Census boundary shows none of the hamlet in a county sewer district, so most homes rely on cesspools or septic systems. We clear the line from the house to the system, but a full or failing cesspool is a job for a cesspool or septic contractor; we don't do cesspool work, and we don't install septic systems.

Little mapped flood risk.

FEMA's current flood map puts under 2% of Greenlawn in the high-risk flood zone.

Water: Greenlawn Water District.

EPA's service-area map puts about 93% of residents, with about 6% on the South Huntington Water District and under 1% on SCWA on the Greenlawn Water District; your bill is the final word. In EPA's UCMR 5 testing, the main supplier reported no PFOA or PFOS. For a leak at the curb or in the street, call your water supplier. For anything on your side of the meter, call us.

Permits.

Greenlawn is an unincorporated hamlet, so plumbing permits go through the Town of Huntington.

Local reference points: the Greenlawn LIRR station and Broadway.

Sources:U.S. Census Bureau, 2020 Census (PL 94-171) and ACS 2024 5-year (B25034, B25035, B25024, B25003, B25040) from the Census Bureau's 2024 ACS summary file; Wikipedia, "Greenlawn, New York" (Old Fields, 1871 LIRR and name, pickles, area, ZIP); Suffolk County GIS Sewer Districts layer, overlaid on the Census 2020 Greenlawn CDP boundary by Atlas (Nov 1, 2026); FEMA National Flood Hazard Layer, overlaid on the Census 2020 Greenlawn boundary by Atlas (Nov 1, 2026); U.S. EPA Community Water System Service Area Boundaries and UCMR 5 results via CityTapWater (supplier shares, estimate).

Why All Island

Why Greenlawn homeowners call us

  • Close byMerrick Road office in Massapequa, about 29 minutes away (free-flow estimate).

Questions

Greenlawn plumbing FAQ

Do you cover all of Greenlawn?
Yes, all of Greenlawn (ZIP 11721, 11740, 11743), plus the neighboring communities listed below.
Is Greenlawn on a sewer or a cesspool?
Mostly cesspools and septic systems; Suffolk's sewer-district map shows no county district here. We clear the house drain line, but cesspool pumping or replacement is for a cesspool or septic contractor.
Who supplies my water?
EPA's service-area map puts about 93% of residents, with about 6% on the South Huntington Water District and under 1% on SCWA on the Greenlawn Water District. Your bill says which. For leaks at the curb or meter, call the supplier; inside the house, call us.
Can you handle the gas piping when I switch from oil to gas?
Yes, we install and repair gas lines for heating equipment and appliances.
When can I reach you in Greenlawn?
We answer calls 24/7. We're open Monday through Saturday and closed on Sunday. Call (631) 644-2084.