Plumbing service
Basement floor drain backing up
That grate in the basement floor is the lowest outlet in the house, so whatever cannot get to the street shows up there first. Water at that grate is a warning about the line beyond it.
- Why it shows here first: Lowest drain in the house
- Common causes: Main blockage, roots at clay joints, lint from laundry, municipal surcharge
- Trap type: Usually a cast iron P-trap set into the slab
- Related protection: Backwater valve on the main line
- Licensed, insured trade work (details confirmed when you call)
- Diagnosis before anything is cut
- Emergency calls taken
- Etobicoke and the west end
At a glance
- Why it shows here first
- Lowest drain in the house
- Common causes
- Main blockage, roots at clay joints, lint from laundry, municipal surcharge
- Trap type
- Usually a cast iron P-trap set into the slab
- Related protection
- Backwater valve on the main line
Reading what comes up
Clear grey water during a laundry cycle points at lint and soap sludge in the floor drain trap or the short pipe to the main. Brown water with paper means the main sewer is blocked downstream and everything in the house is trying to leave through the lowest exit.
- Water rising during a heavy rainstorm while no one is using fixtures is a different story: the municipal sewer may be surcharging, and the fix there is a properly installed backwater valve rather than repeated cleaning.
Clearing from the right spot
We lift the grate, remove any debris trapped in the bowl and run the cable down past the trap in the direction of the main. If the trap is packed with sand and pebbles washed in from old weeping tiles, we clean it out before the cable goes further.
- For main blockages, we work from the front cleanout so the cable runs straight down the house drain to the property line rather than fighting the trap.
Stopping the repeat
After clearing, we run a camera when the house has clay or cast iron under the slab. Roots at clay joints, a broken hub or a section that has settled into a belly are all common in Etobicoke homes built before the 1970s.
- Many floor drains also dry out, letting sewer gas in.
- A trap primer or a simple habit of pouring a jug of water down monthly keeps the seal.
Signs to watch for
- Water appears at the grate when the washer drains
- Sewage smell in the basement on humid days
- Toilet gurgles when the floor drain bubbles
- Damp ring on the concrete around the grate
- Sand or silt sitting in the bottom of the drain bowl
How the job runs
Stop the source
We ask you to stop running water upstairs and find the cleanout.
Clear the trap
Debris and silt are lifted out of the drain bowl and trap.
Cable the main
The line is opened to the property line through the cleanout.
Camera and advise
We record the line and explain whether a valve or repair is worth doing.