Cast iron sewer pipes in a San Diego home

Cast iron under a San Diego bungalow is the drain, not the drinking-water supply. Galvanized steel is the supply-pipe story. Do not mix them. A camera in the line is how the contractor you’re matched with sees scale, cracks, or offset joints. This page will not invent a lifespan.

Cast iron drains versus galvanized supply

Cast iron is heavy, dark, and hubbed. It carries waste. Galvanized is threaded silver-gray metal on the water supply, and it rusts from the inside. If the complaint is rusty tap water, you are on the wrong page. Start at galvanized pipe replacement.

Older central-city houses in North Park, Golden Hill, Mission Hills, and parts of South Park often still have cast iron under the floor. Postwar East County ranches may have mixed laterals. Coastal cottages in Ocean Beach and Pacific Beach can hide short iron runs in a tight crawl. This is housing pattern, not a published inventory. Ask the camera.

Owner maintenance in the City of San Diego includes keeping the sewer lateral clear of roots, grease, and debris, and repairing breaks from the house to the main connection. That duty does not change because the pipe is iron. See sewer lateral responsibility.

What a camera can show, and what this page will not claim

This page will not state how many years cast iron lasts. In-situ performance depends on use, soil, and installation, and no primary source in our ledger gives a San Diego lifespan. A sewer camera inspection can show scale, a crack, an offset, or roots at a joint. It cannot tell you what insurance will pay.

Trenchless sewer repair is a method, not a material. Some C-36 contractors line or replace iron without opening the whole yard. Some open the yard. That is a field decision after the camera, not a blog promise.

If sewage is already in the house, start with sewage backup in the house. If you only have slow drains and a smell, use signs of a sewer line problem.

Do not chemical-jet a mystery iron line from a hardware bottle. The contractor you’re matched with chooses a cable or a jet after they see the pipe.

What the contractor you’re matched with may inspect

Plumbing Pro San Diego is a referral service. We match you with independent C-36 licensed plumbing contractors. You hire the plumber directly. The pros we send work the drain. The brand does not.

A C-36 license covers proper disposal of fluid waste from the building. Forced-air heating does not.

Check the license on the Contractors State License Board site. The database is down Sundays 8 p.m. through Mondays 6 a.m. for maintenance.

California requires a contractor license when the aggregate contract price is $1,000 or more. That threshold moved from $500 to $1,000 on January 1, 2026. Line work in the public right-of-way can also need an encroachment permit. Confirm with the sewer agency on the bill.

On site they typically find the cleanout, run a camera, and tell you whether this is a clear, a spot repair, or a larger sewer line job. They will not invent a price band.

How to request a sewer referral

Have the address and the agency on the water bill. Note whether more than one drain is slow. Note whether you already have a camera clip from an inspection.

Then request a sewer camera inspection or sewer line referral through Plumbing Pro San Diego. We connect you with an independent licensed plumber who serves your city. You hire them, and you pay them. We do not set prices.

When to call us

Call when you need a licensed plumber to see whether the iron drain is scaled, cracked, or still serviceable. Call us at (858) 400-4417 and we’ll connect you with a licensed plumber.