Canadian cities agree that weeping tile should not drain into the sanitary sewer, but they differ in what they pay for and require. As checked in September 2026, Toronto and London publish subsidies for disconnection, sumps and backwater valves; Ottawa refunds permit fees for protective plumbing; EPCOR in Edmonton subsidises backwater valves; Winnipeg requires sump systems in newer homes; Calgary prohibits sanitary discharge.
- Toronto pays up to 80% of invoiced cost, to $400, for severing and capping foundation drains, with separate maximums for sumps, battery backup and backwater valves.
- London pays up to 90% of cost, to $4,000, for a sump pit and pump with weeping tile disconnection, if work has not started when you apply.
- Edmonton has not allowed weeping tile connections to the sanitary sewer since 1988; EPCOR’s up-to-$800 subsidy covers backwater valves only.
- Winnipeg requires sump pit drainage systems in homes built since 1990 and says draining a sump into the floor drain is illegal.
- Calgary says foundation drainage cannot go to the sanitary sewer and suggests replacing sump pumps every 10 years or sooner.
01 /What do Canadian cities have in common on weeping tile?
Three positions come up again and again in the city guidance checked for this page. Foundation drainage belongs at the surface or in a storm or foundation service, not in the sanitary sewer. Sump discharge must land where it will not soak back to the foundation or run onto a neighbour, a sidewalk or a street. And a backwater valve protects a house from sewer surges only if the weeping tile is not still feeding the same drain.
Where cities differ is money and timing. Some pay a share of disconnection and protective plumbing, some only of backwater valves, and some offer guidance but no program. Rules about applying before or after the work, which contractors qualify, and which houses are eligible change between programs and over time. Everything below was read from official city or utility pages in September 2026; confirm with the city before you book any work.
02 /Toronto: Basement Flooding Protection Subsidy Program
Toronto’s program, on a page updated June 18, 2026, pays up to 80% of invoiced cost for several flood-protection items for work completed on or after November 12, 2025. It covers disconnecting foundation drains, which it describes as severing and capping the underground sewer connection, alongside sump pumps, backwater valves and a plumbing assessment.
| Item | Subsidy |
|---|---|
| Foundation drain severance and capping | Up to 80% of invoiced cost, maximum $400 |
| Sump pump (installation or replacement, with alarm) | Up to 80%, maximum $2,250 |
| Battery backup for the sump pump (itemised separately) | Up to 80%, maximum $300 |
| Backwater valve | Up to 80%, maximum $1,600 per device, up to two devices |
| Home plumbing assessment (one time) | Up to 80%, maximum $500 |
| Downspout disconnection | Not eligible |
- Registered owners of single-family, duplex, triplex or fourplex homes in Toronto.
- Downspouts must be disconnected from the sewer system, or exempted by the City.
- The contractor must hold a valid City of Toronto business licence.
- Apply within two years of installation (one year for work completed before November 12, 2025).
- A backwater valve needs a building permit and an inspection before it is enclosed.
- The sump pump should empty onto a permeable surface such as lawn, garden or gravel at least 2 m from the foundation wall.
- The plumbing assessment is subsidised even if you do not carry out the plumber’s recommendations.
03 /London, Ontario: Basement Flooding Grant Program
London’s grant, on a page last modified June 13, 2024, pays 90% of the total cost up to set maximums for work that reduces basement flooding. It names weeping tile disconnection directly: the grant for a new sump pit and pump is tied to disconnecting the existing weeping tile and discharging to a suitable outlet in line with the City’s drainage by-law.
| Item | Grant |
|---|---|
| Sump pit and pump, with existing weeping tile disconnection | 90% of cost, maximum $4,000 |
| Additional weeping tile disconnection | 90%, maximum $2,400 |
| Backwater valve | 90%, maximum $1,800 |
| Sump pump battery backup, installed with a new sump pump | 90%, maximum $1,400 |
Applicants must be the homeowner, must not have commenced any of the works in the application, and must have experienced basement flooding or live in an area prone to it because of the City sanitary main. Apply before you hire.
04 /Ottawa: Residential Protective Plumbing program
Ottawa runs a Residential Protective Plumbing program for sump pumps, changes to footing drains, and storm and sanitary backwater valves. Its FAQ says a building permit is required to install protective plumbing devices, and that the City provides a full rebate or refund of those permit fees when a copy of the permit and inspection report is submitted. The rebate amounts for the devices themselves were not confirmed on the pages checked for this site; call 311 or check the City’s program page.
- Backwater valves became mandatory in new Ottawa homes after 2004 for stormwater and after 2012 for sanitary, according to the FAQ.
- The FAQ describes a secondary sump pump in the same pit or a separate pit, and battery backup as a directly connected uninterruptible supply.
- It lists what protective plumbing does not stop: failed foundation drains or sump pumps, poor foundation or lot drainage, cracks and window wells, and plugged downspouts among them.
- Owners maintain their devices according to the manufacturer, periodically or before forecast heavy rain.
05 /Edmonton: City rules and EPCOR programs
Edmonton’s homeowner guide lays out the history most clearly of any city checked. Before about 1960, houses on combined sewers may have weeping tile connected to the sanitary service. For development before 1988, weeping tile flows went to the sanitary and combined sewer mains. As of 1988, new development must direct weeping tile to the foundation service where available, and the guide notes that sanitary connections have not been allowed in the city since 1988. Neighbourhoods developed after 2006 have separate foundation or storm services for every property, and the weeping tile must connect to them. Adding weeping tile or a backwater valve needs a plumbing permit; call 311.
EPCOR runs the drainage system and two homeowner programs. Its backwater valve subsidy pays up to $800 toward an interior or exterior backwater valve installed by a professional plumber, for separately serviced single-family or duplex homes built before 1989, with a previous sanitary backup, or in areas with previous neighbourhood flooding; it needs a City permit sticker and covers five named valve models, and it does not include weeping tile or sump work. EPCOR also offers a free flood prevention home inspection with an interior and exterior drainage checklist.
06 /Winnipeg
The City of Winnipeg’s basement flooding page says homes built since 1990 are required to have a sump pit drainage system, meaning a sump pit, a sump pump and a discharge pipe, and that homes built after 1979 are required to have a backwater valve. It is blunt about discharge: draining a sump pump into the floor drain is illegal and raises the risk of basement flooding for you and your neighbours, and the hose should end well away from the property line so water does not reach the street, lane, sidewalk or a neighbour’s lot. It recommends a licensed plumber for installation and maintenance.
Winnipeg has run a basement flooding protection subsidy in the past. Its status and amounts were not confirmed on the pages that loaded for this site in September 2026, so ask 311 before assuming any funding is available.
07 /Calgary
The City of Calgary’s guide to lot drainage says foundation drainage cannot be discharged into the City’s sanitary sewer system and must go to the surface or the City’s storm system. When a sump discharges to the surface, the guide directs it away from buildings through landscaped areas to the front or rear of the property, off hard surfaces, at least 2 m from public sidewalks, streets and lanes, and protected from freezing. It advises backup power and a separate circuit for sump pumps, and notes that some older or lower-risk homes may have no weeping tile, in which case lot and roof drainage should be confirmed before a weeping tile system is considered with a building envelope specialist.
Calgary’s climate-ready guidance adds that discharged water should clear the foundation’s backfill zone, that a pump can be tested by pouring water into the pit, that pumps should be replaced every 10 years or sooner, and that where weeping tile connects to the storm system a backup prevention device may lessen water entering basements when that system is overloaded. No City subsidy for weeping tile or sump work appeared on the pages checked.
08 /What do the building codes say across provinces?
Foundation drainage for houses sits in Part 9 of the National Building Code, which provinces adopt with their own changes. The Part 9 wording reviewed for this site, as reproduced in the 2018 British Columbia Building Code, requires the bottom of every exterior foundation wall to be drained unless that can be shown to be unnecessary; tile at least 100 mm; the top of the tile below the bottom of the floor slab; 150 mm of clean crushed stone over it; drainage to a sewer, ditch or dry well; and sump pits at least 750 mm deep and 0.25 m² with a secure, airtight cover. Municipal bylaws then say which kind of sewer.
Alberta has enforced the National Building Code – 2023 Alberta Edition since May 1, 2024, according to the province. Ontario, Quebec and British Columbia publish their own codes. For any project, ask your municipal permit office which edition applies and whether weeping tile, sump or backwater valve work needs a permit.
| City | Sanitary connection | Program for weeping tile work | Ask |
|---|---|---|---|
| Toronto | Severance and capping subsidised | Yes: severance, sump, battery, valve, assessment | 311 / program page |
| London | Disconnection tied to the sump grant | Yes: 90% grants; apply before work | Sewer Engineering |
| Ottawa | Footing drain changes are protective plumbing | Program exists; permit fees refunded | 311 |
| Edmonton | Not allowed since 1988 | Backwater valve subsidy only; free inspection | 311 / EPCOR |
| Winnipeg | Sump systems required since 1990 | Not confirmed | 311 |
| Calgary | Prohibited | None found | 311 |
09 /How do you use a city program without losing it?
- Read the program page first
Note whether you apply before the work or within a time limit after it.
- Check eligibility
Housing type, flooding history, area and past subsidies at the address can all matter.
- Pick an eligible contractor
Toronto, for example, requires a City-licensed business.
- Pull the permits
Sumps, backwater valves and drain changes usually need them, and the inspection record is part of the claim.
- Itemise the invoice
Separate each device and the battery backup so the city can match them to its categories.
- Keep the evidence
Photos, permits, inspection reports, invoices and proof of payment, together.
Planning ranges for the work itself are on the cost page, and the steps of a disconnection are in weeping tile connected to the sanitary sewer. Sump sizing and backups, which several programs fund, are in sump pump choice and backup. If you want contractors in your city to quote, send HAUSE your request.
FAQQuestions people ask
Which Canadian cities pay to disconnect weeping tile?
As checked in September 2026, Toronto subsidises foundation drain severance and capping, and London ties a sump grant to weeping tile disconnection. Other cities have different programs; ask yours.
Does Edmonton subsidise weeping tile disconnection?
EPCOR’s subsidy, up to $800, covers backwater valves only. Weeping tile and sump work are not included in it, as checked September 2026.
Can I drain my sump into the floor drain in Winnipeg?
No. The City of Winnipeg says it is illegal and increases flood risk for you and your neighbours.
Does Calgary offer a weeping tile or sump subsidy?
None appeared on the City pages checked in September 2026. Calgary’s guidance covers where sump water may go and how to maintain pumps.
Do I need a permit for a sump pump or weeping tile?
Often. Edmonton requires a plumbing permit to add weeping tile or a backwater valve, Ottawa requires a building permit for protective plumbing, and Toronto requires one for backwater valves. Ask your municipality.