Water Heater Repair & Installation · West Islip · ZIP 11706, 11795
Water Heater Repair & Installation in West Islip, NYOil-to-Gas Switches and Big Households
All Island Plumbing NY repairs and replaces gas and electric tank water heaters across West Islip (ZIP 11795, parts of 11706), Town of Islip. Call (516) 360-9493. We answer calls 24/7 and are open Monday through Saturday (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, or book a visit online.
Call (516) 360-9493 Book NowPrefer to type? Use Book Now — we call back to confirm.
- Serving Nassau County and western Suffolk County, Long Island, NY
- Licensed & insured across Long Island
- Answering calls 24/7 · Open Mon–Sat, closed Sunday
Four in ten West Islip homes still heat with oil, and that shapes how many of them make their hot water. See our West Islip page and the general water heater repair and installation page.
When the boiler makes the hot water
The Census Bureau's latest survey shows 41% of West Islip homes heating with fuel oil and 53% with utility gas. In many oil-heated houses, there's no separate water heater at all: the boiler heats domestic water through a coil or a tank connected to it. When a family switches to gas, the hot water usually moves to its own gas tank heater, with new gas piping and its own vent. National Grid's Natural Gas Conversions line is 1-877-696-4743. We install the gas water heater and run the gas line. We don't service oil burners or boilers, and we don't sell or deliver oil.
Big houses, busy mornings
The survey puts the median West Islip home at 7.3 rooms, with 48% having four or more bedrooms, and the average owner household at 3.14 people. Houses that size often have two or three full bathrooms, sometimes at opposite ends of the house. If a far shower takes a long time to run hot, the distance is often the cause, not the tank. If everyone runs out of hot water mid-morning, we check for sediment and a failed dip tube before sizing up.
Area 1 water: soft, acidic, iron-bearing
The Suffolk County Water Authority puts West Islip in its Distribution Area 1. SCWA says the groundwater there is naturally acidic, pH 4.5 to 6.8, and it adds lime to raise it. Its 2026 report shows Area 1 water soft, averaging about 37 mg/L of hardness, but carrying iron that averaged 218 micrograms per liter and sometimes topped New York's 300 standard. Heating drops some of that iron into the bottom of the tank. If only the hot water runs rusty, flush the heater; if both sides do, call SCWA at (631) 698-9500.
Basements near the bay
Our overlay of FEMA's flood map puts about 8% of the hamlet's area in the high-risk zone, along the canals at the south end. A heater that has sat in salt water should stay off until it's checked, and usually has to be replaced. In those basements, we can set the replacement on a stand if the vent and gas line allow.
Repair or replace?
A heater that won't light, or loses heat, often needs a thermocouple, a gas valve or an element. A tank that's leaking from the body needs to be replaced. We tell you which before any work starts.
More
More for West Islip and nearby
Water heaters in nearby towns
Questions
Water heaters in West Islip: FAQ
We have no water heater, just a boiler. Is that normal?
Only our hot water is rusty. What's wrong?
Our back bedroom shower takes forever to get hot. Do we need a bigger tank?
Sources:U.S. Census Bureau, ACS 2024 5-year (B25040) and B25010, B25018, B25041 from the Census Bureau summary file; National Grid, Long Island phone numbers (Natural Gas Conversions); Suffolk County Water Authority, 2021 Water Distribution Area Index and 2026 Drinking Water Quality Report (Area 1 pH and lime, hardness, iron); FEMA National Flood Hazard Layer overlaid on the Census 2020 West Islip CDP boundary (Atlas, Nov. 5, 2026).