Many older Markham homes have foundation drainage — weeping tile — connected directly to the sanitary sewer. That was standard practice decades ago, but it means every storm dumps groundwater into a sewer system that wasn't built for it, overloading the pipes and raising backup risk for your home and your neighbours.
Disconnecting the weeping tile from the sanitary sewer and routing it to a sump pump instead is one of the most effective flood protection upgrades an older home can get. The City of Markham's Private Plumbing Protection Rebate Program can help offset the cost of this work. Two things matter most: you must get pre-approval from the City's Environmental Services department before any work begins, and the work requires a permit and a City inspection. Rebate amounts change, so confirm current amounts with the City before you plan your budget.
Weeping Tile Disconnection Around Markham
If your Markham home was built before the late 1980s, there's a good chance your foundation drains into the sanitary sewer. You can often tell without any tools: no sump pit, a floor drain that backs up during storms, and downspouts that were disconnected years ago while the bigger source underground was never touched.
Disconnection pairs naturally with a sump pump and often a backwater valve, and the City's rebate program is built around exactly that combination. The key rule bears repeating: pre-approval from Environmental Services must be in hand before work starts, and a permit and City inspection follow. Confirm current amounts with the City.
Signs You Need Weeping Tile Disconnection
Your home is a candidate for disconnection if:
- Your home was built before the late 1980s. Homes of that era in Unionville, Markham Village, Milliken and Thornhill commonly have weeping tile tied into the sanitary sewer.
- You've had storm-related sewer backups. Foundation drainage overloading the sanitary line during storms is a classic cause of backups in older Markham neighbourhoods.
- Your floor drain backs up during heavy rain. If backups happen specifically during storms rather than randomly, storm water entering the sanitary system is the likely mechanism.
- You have no sump pump. A home with weeping tile but no sump pit almost certainly drains its foundation into the sanitary sewer.
- You're planning other flood protection work. Disconnection, a sump pump and a backwater valve work as a system. Doing them together is often more practical and may fit the rebate program's scope.
How We Do It
- 1
Investigate your drainage
We confirm how your weeping tile connects — camera inspection and dye testing show where foundation drainage actually goes.
- 2
Plan the new configuration
The design routes weeping tile to a new or existing sump pit, with the sanitary connection capped.
- 3
Rebate pre-approval
For the City's rebate program, pre-approval from Environmental Services must be obtained before work starts. We explain the process and what the City needs.
- 4
Permit
Disconnection work requires a plumbing permit, arranged before any work begins.
- 5
Disconnect and install
The sanitary connection is capped, the weeping tile is routed to the sump system, and the pump discharges safely away from the foundation.
- 6
City inspection and testing
The City inspects the work — a program requirement — and we test the full system so you see it working.
Why Choose Markham Plumbing
Disconnection done right protects your home and takes load off the whole street's sewer.
- Camera and dye testing to confirm how your drainage actually connects
- Rebate pre-approval process explained before you commit
- Permit and City inspection handled as part of the job
- Sump pump sized for your foundation's real inflow
- Discharge routed safely away from the foundation
- Combined with backwater valve work where it makes sense
Weeping Tile Disconnection FAQs
How do I know if my weeping tile is connected to the sanitary sewer?
The age of the home is the first clue — pre-1990s Markham homes commonly are. Confirmation comes from a camera inspection and dye testing, which show exactly where foundation drainage goes. We do this before quoting any disconnection work.
Does Markham offer a rebate for weeping tile disconnection?
Yes — disconnection is one of the measures covered by the City's Private Plumbing Protection Rebate Program. Pre-approval from Environmental Services is required before work begins, and the work needs a permit and City inspection. Confirm current amounts with the City, as they change.
What happens to the water after disconnection?
Foundation drainage is routed to a sump pit, and the sump pump discharges it to the surface, away from the foundation — instead of into the sanitary sewer. Your foundation stays drained; the sewer stays unburdened.
Is disconnection disruptive?
The work is concentrated at the sump location and the connection point, usually in the basement. Floor cutting is involved where a new pit is needed, and the concrete is restored afterwards. Most projects take one to two days plus inspection scheduling.
Should I do this at the same time as a backwater valve?
Often, yes. The two measures address different failure modes — disconnection reduces storm load, the valve blocks surcharge from coming back — and doing them together shares the floor work, permit and inspection. We'll assess both and quote honestly.