Looking for a cast iron pipe plumber in Duarte, CA? Describe your project once and up to five licensed plumbers who work in Duarte and Los Angeles County get back to you with a quote. It's free and there is no obligation.
Duarte is home to about 23,493 people (2024 Census Bureau estimate), a growing community (+8.1% since 2020). With 3,502 people per sq mi, it is a suburban area. Homes built before the mid-1970s often still have cast iron drains reaching the end of their life.
Duarte at a glance
- Population (Census Bureau estimate, 2024)
- 23,493 (+8.1% since 2020)
- Rank in California
- 280th of 482 cities and towns
- Land area
- 6.7 sq mi
- Population density
- 3,502 people per sq mi (suburban)
- Type
- City (Duarte city)
- Main county
- Los Angeles County
What to check before hiring in Duarte
- Camera first: a video inspection shows where and how badly the pipe is damaged.
- License and permit: in California, drain work is done by a licensed plumber under a permit.
- Method: ask for both lining and replacement options when possible.
- Price drivers: length, slab access, tunneling, method and restoration.
Useful official resources
-
IAPMO: plumbing codes
Official information and guidance.
-
NASSCO: pipeline rehabilitation
Official information and guidance.
Services available in Duarte
-
Cast iron drain replacement
Replacement of cast iron drain lines with PVC, including under-slab work where needed.
-
Cast iron pipe lining
Rehabilitation of cast iron drains with an epoxy or cured-in-place liner.
Frequently asked questions in Duarte
How much does cast iron replacement cost in Duarte, CA?
It depends on the length, the slab and the method. Describe your home: plumbers who serve Duarte reply with a quote.
How long does it take?
From a few days for lining to a week or more with tunneling.
Can I stay at home?
Often yes, with limited plumbing use during the work.
Which licensed plumbers will contact me?
Up to five independent licensed plumbers who serve Duarte and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.