Water Heater Repair in New London, CT
Nearly half of New London's homes were built before 1940, and most households rent. Old houses and shared buildings change how a water heater job goes. If yours has quit, is leaking or making noise, call and get a plumber out.
What shapes water heater trouble in New London
The oldest housing we cover in Connecticut
The median New London home was built in 1945, and about 47% date from before 1940. In houses that old, the water heater often sits in a tight basement with older venting, shutoff valves and pipe that may have been patched more than once. Those are worth checking whenever the heater is repaired or replaced.
Two in three households rent
About 64% of New London households rent. If you rent, tell your landlord or property manager first, since the heater usually belongs to the building. If water is spreading, shut the cold supply valve on top of the heater and turn off the power or gas while you wait.
Lake Konomoc water, treated for corrosion
The city's 2025 water report says New London's water comes from lakes and reservoirs in a protected watershed in Waterford, Montville and Salem. The main reservoir, Lake Konomoc, stores over 1.2 billion gallons. At the Konomoc plant, lime is added to adjust the pH and phosphate is added for corrosion control before the water travels through 210 miles of pipe.
About 42% of homes heat with gas and 30% with electricity, so both kinds of water heater are common here.
Safe steps for New London homes
- Leaking? Close the cold water valve on top of the tank.
- Turn off the gas valve or the breaker for the heater.
- Gas smell? Eversource serves New London. Leave the house, call 911 from outside, then Eversource at 877-944-5325.
Repair, replacement and emergencies

Water Heater Repair
Gas, electric and tankless repairs, from pilot lights to heating elements.
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No Hot Water
Cold shower this morning? Get the cause found and fixed fast.
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Leaking Water Heater
Water around the tank or a dripping relief valve. Act before it floods.
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Emergency Water Heater Repair
Burst tank, gas smell or water everywhere. Call right away.
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Water Heater Replacement
When repair no longer makes sense, get a new tank or tankless unit.
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Tankless Water Heater Repair
Error codes, lukewarm water and scale buildup on tankless units.
Learn moreNew London water heater questions
Who is the gas company in New London, CT?
Eversource lists New London among its Connecticut gas towns. If you smell gas, leave first, call 911 from outside, then Eversource at 877-944-5325.
I rent in New London. Who fixes the water heater?
Usually the landlord, since the heater belongs to the building. Tell them right away, and shut off the water to the heater if it's leaking.
Where does New London's water come from?
From reservoirs in Waterford, Montville and Salem, mainly Lake Konomoc, according to the city's 2025 water report.
How cold does it get in New London?
NOAA's Groton-New London airport station averages about 107 nights a year at or below freezing, with January lows near 23°F.
Where these local facts come from
- US Census Bureau, American Community Survey 2020-2024 (via Census Reporter)
- NOAA NCEI, 1991-2020 climate normals
- City of New London, 2025 Annual Water Quality Report
- Eversource, communities we serve (Connecticut gas towns)
- Eversource, report a gas leak (CT)
Figures are the latest published by each source. Pricing and availability are set by the plumber.
No hot water in New London?
Call now for water heater repair or replacement.