Open 24 hours, 7 days. Licensed NYC master plumbers.Brooklyn, Queens, Staten Island and Manhattan
GW Mechanical Corp 24/7 646-980-2411

Heat service

Hot water tank replacement in NYC

Same-day replacement, upgrades and new installs in Brooklyn, Queens, Staten Island and Manhattan. We bring 40, 50 and 75 gallon tanks with us, so you are not waiting days for delivery.

Call 646-980-2411Request a replacement

What we do

Emergency replacement

Leaking or dead tank, no hot water. Same-day in most cases, any hour.

Upgrade to a larger tank

Running out of hot water? We move you to 50 or 75 gallons and check that venting and gas supply can support it.

New water heater installation

Renovations, new bathrooms and conversions. Supply, gas, venting and expansion tank included.

Building and commercial tanks

Multi-family, co-op, restaurant and commercial water heaters, coordinated with the super or manager.

Which tank size fits?

Our plumber confirms on site, but this is a reliable starting point. More detail in the water heater size guide.

40
gallons
  • 1 to 2 people
  • Studio and 1-bedroom
  • One bathroom
In stock
50
gallons, most common
  • 2 to 4 people
  • 2 to 3 bedrooms
  • Most private houses
In stock
75
gallons
  • 5 or more people
  • Multiple bathrooms
  • Light commercial
In stock

Signs your tank is failing

Rusty or discolored hot water

Corrosion inside the tank, often near the end of its life.

Water pooling under the tank

A leak from the tank body cannot be repaired. Shut off the water to the heater.

Rumbling or popping

Sediment build-up on the bottom, which cuts efficiency and stresses the tank.

Relief valve dripping

Often a failed expansion tank or excess pressure. See our expansion tank page.

Every replacement includes

  • Removal and disposal of the old tank
  • New 40, 50 or 75 gallon water heater
  • New temperature and pressure relief valve
  • Expansion tank check, replaced if waterlogged
  • New supply connectors and gas connection
  • Venting checked and reconnected
  • Required NYC Department of Buildings filing
  • Leak, pressure and temperature test

Recent jobs

Real installations by our crew. More are added as jobs are finished.

Three white Navien tankless water heaters mounted side by side on a wall, each with its own PVC intake and exhaust vent through the ceiling, copper gas and water piping with yellow-handled valves below, and two condensate neutralizer cartridges on the drain lines
NYC multi-family building, mechanical room

Recent job

Bank of three Navien tankless water heaters

  • Three Navien condensing tankless units working together for high hot water demand
  • Each unit on its own PVC intake and exhaust venting through the ceiling
  • Recirculation piping so hot water reaches the fixtures fast
  • Gas line sized for all three units firing at once, with isolation valves
  • Condensate neutralizer cartridges on the drain lines, as condensing units require

Linking tankless units means hot water never runs out, even with many showers running at once. When demand is low, only one unit fires, which saves gas.

Related: Tankless water heaters · Hot water tanks · Restaurant plumbing

Hot water tank replacement by borough

Same-day tank replacement in every neighborhood we serve.

Brooklyn

ZIP codes 11201–11256

  • Williamsburg
  • Greenpoint
  • DUMBO
  • Brooklyn Heights
  • Cobble Hill
  • Carroll Gardens
  • Red Hook
  • Park Slope

All Brooklyn neighborhoods

Queens

ZIP codes 11004–11697

  • Astoria
  • Long Island City
  • Sunnyside
  • Woodside
  • Jackson Heights
  • Elmhurst
  • Corona
  • Flushing

All Queens neighborhoods

Staten Island

ZIP codes 10301–10314

  • St. George
  • Tompkinsville
  • Stapleton
  • New Brighton
  • West Brighton
  • Port Richmond
  • Westerleigh
  • Clifton

All Staten Island neighborhoods

Manhattan

ZIP codes 10001–10282

  • Financial District
  • Battery Park City
  • Tribeca
  • SoHo
  • Chinatown
  • Lower East Side
  • East Village
  • Greenwich Village

All Manhattan neighborhoods

Hot water tank questions

Can you replace my hot water tank the same day?

Usually, yes. We carry 40, 50 and 75 gallon tanks on the truck, so a standard replacement is typically finished in 2 to 3 hours after we arrive.

What size hot water tank do I need?

40 gallons suits 1 to 2 people, 50 gallons suits 2 to 4 people and is the most common replacement, and 75 gallons suits larger households, multiple bathrooms or light commercial use.

Can I upgrade to a bigger tank?

Yes. Going from 40 to 50 or from 50 to 75 gallons is common. We confirm the space, venting and gas supply can handle the larger unit first.

Do I need a permit to replace a water heater in NYC?

Yes. Gas water heater replacement must be done by a licensed master plumber with the required Department of Buildings filing. We take care of it.

Will you take away the old tank?

Yes. Removal and disposal of the old water heater is part of every replacement.

Is no hot water an HPD violation?

Yes. Hot water is required all year at 120°F or higher at the tap. Lack of hot water is a Class C, immediately hazardous violation that must be corrected within 24 hours.

Guides

Read our guides on water heater replacement in NYC, water heater repair, installation to NYC code and gas versus electric.

No hot water?

Tell us the size on the tank label if you can. We load the right one and head out.

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