PLUMBING GUIDE
Cast Iron Drain Pipes in Florida Homes: Signs They’re Failing
Cast iron drains were standard for decades. In Florida’s climate, many are now reaching the end of their life.
Why cast iron is a Florida problem
Cast iron was the standard drain pipe in many homes built through the 1970s. It’s strong, but it corrodes from the inside. Over decades, scale builds up, the bottom of the pipe wears thin and cracks can form, especially in a warm, humid climate and in homes where the pipe runs under the slab.
Warning signs to watch for
Failing cast iron rarely breaks all at once. It usually shows up as a pattern:
- Drains that clog repeatedly, especially the main line
- Slow drains in several fixtures
- Sewer odors inside the house
- Wet spots, cracks in flooring or unexplained damp areas
- Visible rust or flaking on exposed drain pipe
How to confirm it: camera inspection
A sewer camera inspection shows the inside of the pipe: scale, cracks, holes in the bottom of the pipe (sometimes called channeling) and root intrusion. It’s the only reliable way to know whether a line needs cleaning, a spot repair or replacement.
Your repair options
If damage is limited to one section, a spot repair may be enough. If the line is deteriorated throughout, replacing it with PVC is usually the long-term fix. For lines under a slab, the route and method matter, so it’s worth getting a clear explanation of the options before deciding.
Buying an older home?
A standard home inspection usually doesn’t look inside drain lines. A sewer camera inspection before closing can reveal problems that would otherwise surface after you move in.
