Inspector's check · Basement and crawlspace
If the house is older, are the cast iron drain pipes free of rust, cracks and stains?
Homes built before about 1975 often have heavy black cast iron drain pipes and a main stack in the basement. Look along them, especially the bottom of horizontal runs and the joints, for orange rust, flaking, cracks, dried brown stains or damp spots, and notice sewer smells or slow drains. The buried line out to the street can't be seen; a plumber's camera inspection (sewer scope) shows its condition.
Why it matters
Cast iron rusts from the inside out and often cracks along the bottom where you can't see it. A failing drain leaks sewage into the basement or backs up, and replacing a buried line can cost thousands.
If it's a problem
An inspector would write it up as “Cast iron drain or sewer line showing wear” and rate it fix this year. Your options, with rough U.S. costs:
- DIY, $0: Photograph rusty or stained spots and watch them; keep drain cleaners with lye or acid out of old cast iron.
- Pro (usually best), $250 to $5,000: Plumber does a camera inspection of the drains and sewer line, then replaces failing sections with PVC or lines the pipe.
Get this on your own house's plan
DwellTended builds a seasonal plan for your actual house, shows what needs you this week with rough costs, and reminds you before things are due. Free to start, no inspection report needed.