Homeowners rarely think about sewer lines until there’s a backup, foul odor, or a drain that suddenly won’t clear. But knowing how long a sewer line typically lasts—and what speeds up failure—can help you plan maintenance and avoid emergency repairs.
Typical sewer line lifespans by material
The expected service life varies widely because sewer pipes are built from different materials and installed under different conditions. In many residential settings, a sewer line can last:
- Clay (common in older homes): often 30 to 60 years
- Cast iron: commonly 50 to 75 years
- ABS/PVC (plastic): frequently 50 to 100+ years
- Brick/stone and older masonry joints: can fail earlier due to mortar and joint deterioration
Even when pipes are still pres ... Read more »





