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Low Water Pressure in San Anselmo, CA

San Anselmo has 6,192 occupied homes across 1 ZIP code, and the typical one was built in 1955. 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.
San Anselmo sits 16 years older than the CA median of 1971. Of the 257 CA towns we route calls in, its housing is older than 96% of them, and by number of homes it ranks 203rd.
What 1955 tells you about the pipe in San Anselmo
Housing of this vintage generally means galvanized steel still the norm, with copper appearing towards the end of the decade. A house from these years may have had part of its supply replaced and part left alone, which is why pressure can be fine in one bathroom and poor in another. More on 1950s supply pipe.
70% of occupied homes in San Anselmo are owner-occupied, 7 points above the CA figure of 63%. It matters here because the run between the meter and the house belongs to the property owner, not the utility.
Median household income across San Anselmo ZIP codes is $172,332, 65% above the CA median of $104,737.
Before calling anyone in San Anselmo, 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.
San Anselmo against the nearest CA towns we cover
| Town | Typical build year | Occupied homes |
|---|---|---|
| San Anselmo | 1955 | 6,192 |
| Greenbrae | 1963 | 5,651 |
| Belvedere Tiburon | 1968 | 4,942 |
| Corte Madera | 1960 | 4,037 |
| Larkspur | 1972 | 3,431 |
Nearby towns we cover
- Mill Valley typical build 1961 · 6 years newer
- Ross typical build 1942 · 13 years older
- Sausalito typical build 1967 · 12 years newer
- Eureka typical build 1963 · 8 years newer
- Arcata typical build 1975 · 20 years newer
- Mckinleyville typical build 1991 · 36 years newer
Worth reading for a 1955-era home
- galvanized supply pipe
- whole-house pressure loss
- pressure worse upstairs
- how to test your pressure
- low pressure on hot only
ZIP codes we route in San Anselmo
- 94960
Low water pressure help near me in San Anselmo
Give us your San Anselmo 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.