Long Island Water Heater Experts: Repair, Replace & Install
If you've ever stepped into a cold shower at 6 a.m. on a January morning in Hauppauge or watched a slow puddle creep across your basement floor in Massapequa, you know how fast a water heater problem becomes an everyday-life problem. All Island Comfort has been keeping hot water flowing in Long Island homes since 2004 across every type of system: conventional tank water heaters, tankless on-demand units, heat pump water heaters, indirect tanks tied to boilers, and full solar setups.
Whether you need a fast repair on the unit you have, a like-for-like replacement, a tankless conversion, or a complete oil-to-gas changeover with a new water heater, we handle it from one call. Family-owned, fully licensed, and never subcontracted.
- Conventional Tank Water Heater Repair & Installation
- Tankless (On-Demand) Water Heater Installation
- Heat Pump (Hybrid) Water Heaters
- Indirect Water Heaters (Boiler-Fed)
- Solar Water Heater Service
- Water Heater Flushing & Maintenance
- Anode Rod Replacement
- T&P Valve, Thermostat & Element Service
- Recirculating Pump Installation
- 24/7 Emergency Water Heater Repair
Call 631-591-2289 for fast water heater service on Long Island, or request a quote online.
No Hot Water?
Skip the cold-shower stress. Most repairs are done same-day with parts on the truck. Most replacements happen the same day too.
Call 631-591-2289Types of Water Heaters We Install & Service
Picking the right type of water heater matters as much as the size. Each option has a different cost, lifespan, energy bill, and footprint. Here's what we install across Long Island:
Conventional Tank (Storage) Water Heaters
The classic 40-, 50-, or 75-gallon tank that sits in your basement or utility closet. Affordable upfront, easy to replace, available in natural gas, propane, oil, and electric. Lifespan is typically 8 to 12 years. Best for homes that prefer the lowest install cost and don't need to free up floor space.
Tankless (On-Demand) Water Heaters
Heats water as you use it, with no storage tank. Endless hot water, dramatically lower standby losses, lifespan of 18 to 25 years, and a wall-mount footprint that frees up your basement or closet. We install Navien, Rinnai, Bosch, and Rheem tankless units, including conversions from existing tank setups. Tankless typically requires gas-line and venting upgrades, both of which we handle in-house.
Heat Pump (Hybrid) Water Heaters
Uses ambient heat from the surrounding air to make hot water at 2-3x the efficiency of a standard electric tank. Qualifies for federal tax credits and NYS Clean Heat rebates. Best for basements with steady ambient temperatures and a bit of ventilation. Lifespan around 10 to 15 years. We install Rheem, A.O. Smith, and Bradford White heat pump water heaters.
Indirect Water Heaters
An insulated tank heated by your boiler instead of its own burner. No additional combustion, very long lifespan (often 20+ years), and excellent recovery rates. Pairs especially well with high-efficiency boilers. Learn more about our Long Island boiler services.
Solar Water Heaters
Solar-thermal collectors paired with a storage tank, often as a pre-heater for a conventional or tankless unit. Substantial energy savings on Long Island where rooftops get good southern exposure. Higher upfront cost but excellent payback when combined with available rebates and tax credits.
Water Heater Repair
Whether your water heater isn't producing hot water, leaking from the bottom, smelling off, or making rumbling noises, our experienced techs diagnose and fix any water heater issue across Long Island, including:
- No Hot Water
- Not Enough Hot Water
- Water Too Hot or Inconsistent
- Tank Leaking from Bottom or Top
- Leak from T&P Relief Valve
- Pilot Light Won't Stay Lit
- Burner or Element Won't Fire
- Rumbling, Popping, or Banging Noises
- Sediment Buildup at Bottom of Tank
- Rusty or Discolored Hot Water
- Rotten-Egg or Sulfur Smell
- Failed Anode Rod
- Cracked or Failed Heating Element
- Faulty Thermostat or Gas Valve
- Tankless Error Codes & Lockouts
- Tankless Scale & Flow Problems
Most of our trucks carry the parts to fix common water heater issues on the first visit. Same-day repair is the rule, not the exception. Call 631-591-2289 any time, day or night.
"Water heater started leaking on a Saturday morning. Called All Island Comfort, they had a tech out in two hours, replaced it with a new Bradford White, and we had hot water back the same afternoon. No drama, no inflated weekend pricing."
Water Heater Replacement
If your water heater is over 10 years old, leaking, or you're done dealing with constant repairs, replacement is usually the better long-term call. Signs you should replace rather than repair on Long Island:
- Tank Is 10+ Years Old (Tank Models)
- Tank Is 18+ Years Old (Tankless)
- Visible Rust on the Tank Exterior
- Water Leaking from the Tank Itself
- Rusty or Murky Hot Water
- Rumbling Noises Despite Flushing
- Rising Energy Bills with No Other Cause
- Recovery Time Has Slowed Significantly
- Repeated Pilot or Ignition Failures
- Insurance Carrier Wants It Replaced
We give every customer real numbers: cost to repair vs cost to replace, projected energy savings of a more efficient unit, and any rebates or tax credits that apply. No high-pressure pitch.
Tankless Water Heater Conversions
Switching from a tank to a tankless on-demand water heater is one of the smartest upgrades a Long Island homeowner can make. We've handled hundreds of conversions and can talk through the realities, not just the marketing.
Typical conversion benefits:
- Endless Hot Water (No Tank to Empty)
- 20 to 35 Percent Lower Operating Costs
- 18-25 Year Lifespan vs 8-12 for Tank
- Frees Up 6+ Square Feet of Basement Space
- Eligible for Federal Tax Credits & Rebates
- Wall-Mounted, Out of the Way
What's involved? Most conversions need a larger gas line, dedicated venting (often stainless or PVC), and a condensate drain. We handle the gas-line work, the venting, and the permits as a single project. Call 631-591-2289 for a tankless conversion estimate.
Water Heater Maintenance & Flushing
Water on Long Island carries a fair amount of dissolved minerals depending on your town. Without annual maintenance, sediment builds at the bottom of your tank, the burner has to work through it, and efficiency drops every year. Our annual water heater service includes:
- Full tank flush (or descale on tankless)
- Anode rod inspection (replace if needed)
- T&P relief valve test
- Combustion check on gas units
- Thermostat calibration
- Element and connection check on electric units
- Burn assembly cleaning on gas units
- Visual leak inspection
- Vent and combustion air verification
- Written report with current condition and recommended next steps
How to Size a Water Heater for Your Long Island Home
The wrong-size water heater is one of the most common reasons households deal with cold showers. Use this as a starting point and we'll confirm during the in-home estimate:
- 1-2 People: 30-40 gallon tank or 5-7 GPM tankless
- 2-3 People: 40-50 gallon tank or 6-8 GPM tankless
- 3-4 People: 50-gallon tank or 7-9 GPM tankless
- 4-5 People: 60-75 gallon tank or 8-10 GPM tankless
- 5+ People or Multi-Bath: 75-80 gallon tank or 10+ GPM tankless
- Whirlpool Tubs / High Demand: 80+ gallon or twin tankless setup
Hot-water demand also depends on simultaneous usage (showers + dishwasher + laundry), incoming water temperature, and pipe runs. Tankless units are sized in GPM (gallons per minute) rather than total gallons, so the math is different. We'll do the calculation for you.
Water Heater Brands We Install & Service
Our techs work on every major residential water heater brand. We carry the most common units on the truck and can source any model on a next-day basis when needed. Brands we routinely install across Long Island:
- Bradford White
- Rheem
- A.O. Smith
- State
- Bock
- Bosch
- Navien
- Rinnai
- Noritz
- Buderus
- Lochinvar
- Crown
- Burnham
- Weil-McLain
- Whirlpool
- Kenmore
- GE / GE Appliances
- American Standard
Why Call All Island Comfort for Water Heater Service?
Anyone with a wrench can swap a tank water heater. Doing it correctly, to code, with the right venting, gas pressure, expansion tank, and pan, is a different job. Long Island homeowners pick us because:
- Family-Owned in Wading River Since 2004
- Same-Day Service Across Suffolk & Nassau
- Tank & Tankless Certified Installers
- Fully Licensed Plumbing for Long Island Code
- Honest, Up-Front Pricing in Writing
- Trucks Stocked for Most Common Repairs
- Rebate & Tax Credit Documentation Handled
- 24/7 Emergency Response
"They installed a Navien tankless when our 14-year-old tank finally died. They handled the larger gas line, the new venting, and even helped with the rebate paperwork. House feels different - endless hot water and the basement got 6 feet of floor space back."
How It Works: Three Easy Steps
- 1Call or Send a Photo
Tell us the symptom (no hot water, leak, age, etc.) and what's installed today. A photo of the unit's data plate speeds the quote.
- 2Get a Same-Day Visit or Estimate
Most service calls happen the same day. Replacement and conversion estimates can be done by phone, video, or in person.
- 3Job Done, Same Day
Repairs and standard tank replacements are usually completed in a single visit. Tankless conversions and complex installs are typically a single day.
Related Long Island Services
Water heater work often touches the rest of your home's mechanical system. Here are related All Island Comfort services that customers commonly pair with water heater service: