Older Homes: Galvanized, Cast Iron and Clay Pipe

Why so many older homes

After the 1925 earthquake destroyed the downtown business district, much of central Santa Barbara was rebuilt in the Spanish Colonial Revival style that still defines the city (Wikipedia: 1925 Santa Barbara earthquake). Neighborhoods grew outward through the middle of the century. Homes from those decades often keep original plumbing hidden in walls and under floors.

Galvanized supply pipe

Galvanized steel water pipe was standard in many homes built before the 1960s. It rusts from the inside over decades. Signs: low pressure, especially on hot water; brown water after it sits; leaks at threaded joints. The EPA notes that galvanized pipes can accumulate lead if they were ever downstream of lead pipe or components (U.S. EPA, basic information about lead in drinking water). If you have concerns, your water supplier can explain testing.

Cast-iron drains

Cast iron drain and vent pipe lasts a long time but corrodes inside, especially on the bottom where water runs. Scale narrows the pipe and catches debris. Cracks can open along the bottom. Signs: slow drains, odors, rust stains at joints.

Clay sewer laterals

Clay sewer pipe was common outside the foundation. Roots enter its joints, and ground movement can crack or offset sections. Signs: repeat main-line clogs and gurgling. See the sewer lateral guide.

Planning replacement

• Supply lines: a repipe with PEX or copper restores pressure and ends rust. See repiping.
• Drains: sections of cast iron can be replaced where accessible; lining is an option for some lines.
• Lateral: camera inspection first, then repair or replace.
• Permits: through the City of Santa Barbara (City of Santa Barbara (building permits and inspections)) or the County (County of Santa Barbara).

Historic homes

Many older homes have plaster walls and tile that owners want to keep. A plan that routes new pipe through attics, crawlspaces and closets limits the openings.

Related pages: repiping & pipe replacement, sewer line inspection & repair, leak detection & repair, and what shapes an estimate.

Sources: Wikipedia: 1925 Santa Barbara earthquake; U.S. EPA, basic information about lead in drinking water; City of Santa Barbara (building permits and inspections); County of Santa Barbara.