Guide: sewer laterals
Seven Signs Your Sewer Lateral Is Failing
The sewer lateral moves all waste out to the municipal main under the road. Here are the signs it is failing and what to do before it causes a backup.
- Gurgling from the floor drain or toilets when water runs elsewhere
- More than one fixture slowing down together
- Backups that return a few months after clearing
- Roots or bits of clay on a drain cable
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Early warning signs
- Gurgling from the floor drain or toilets when water runs elsewhere
- More than one fixture slowing down together
- Backups that return a few months after clearing
- Roots or bits of clay on a drain cable
- Soggy patches or sinkholes in the front yard
- Sewer smells in the basement
Why laterals fail
Many North York laterals are clay pipe from the 1950s and 1960s. Joints loosen over time, letting in roots. Soil movement shifts sections and creates sags. Cast iron rusts and scales inside. Even newer plastic pipe can be damaged by heavy equipment, poor bedding or root pressure.
What to do
- Stop using water if a backup is happening.
- Call to have the line cleared.
- Book a camera inspection to see the condition of the pipe.
- Decide between maintenance, spot repair or replacement based on what you see.
Repair options
Root cutting manages minor intrusion. Spot repair fixes a single cracked or sagging section. Full replacement suits laterals with damage along much of their length. See sewer camera inspection, sewer line repair and sewer line replacement.
Questions we get about this
How often should a lateral be inspected?
Without symptoms, there is no fixed schedule. A camera look before buying, renovating or after a backup gives you a useful baseline.