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Low Water Pressure in Londonderry, NH

Londonderry has 9,482 occupied homes across 1 ZIP code, and the typical one was built in 1985. That year is the most useful single fact for working out why the water pressure is weak, because it predicts what the supply pipe is made of.
Londonderry sits 6 years newer than the NH median of 1979. Of the 127 NH towns we route calls in, its housing is older than 26% of them, and by number of homes it ranks 11th.
What 1985 tells you about the pipe in Londonderry
Housing of this vintage generally means copper throughout in most cases, with polybutylene fitted in some homes built from the late seventies onward. Polybutylene was discontinued in the mid-nineties and is worth identifying, because its failures are sudden rather than gradual. More on 1980s supply pipe.
86% of occupied homes in Londonderry are owner-occupied. It matters here because the run between the meter and the house belongs to the property owner, not the utility.
Median household income across Londonderry ZIP codes is $132,241, 29% above the NH median of $102,662.
Before calling anyone in Londonderry, check whether every tap is weak or just one. Normal supply is 45–80 psi and under 40 psi is low — how to test it in a minute. Whole house is a supply problem worth a call; one tap is usually a five-minute job you can do yourself.
Londonderry against the nearest NH towns we cover
| Town | Typical build year | Occupied homes |
|---|---|---|
| Londonderry | 1985 | 9,482 |
| Dunbarton | 1993 | 1,181 |
| Greenfield | 1980 | 688 |
| Greenville | 1977 | 1,410 |
| Hollis | 1979 | 3,367 |
Nearby towns we cover
- Hudson typical build 1982 · 3 years older
- Litchfield typical build 1986 · same era
- Merrimack typical build 1984 · same era
- Milford typical build 1982 · 3 years older
- Mont Vernon typical build 1982 · 3 years older
- Nashua typical build 1969 · 16 years older
Worth reading for a 1985-era home
- pressure-reducing valves
- whole-house pressure loss
- polybutylene supply pipe
- how to test your pressure
- pressure drops when two taps run
ZIP codes we route in Londonderry
- 03053
Low water pressure help near me in Londonderry
Give us your Londonderry ZIP code and what is happening. We check it against partner coverage and connect you with an independent contractor covering that area. We do not do the work and you are never charged.