St. Catharines backwater valve rebate eligibility: the FLAP guide.

The City of St. Catharines Flood Alleviation Program (FLAP), including the current Emergency FLAP, pays up to $5,000 at 90% of eligible costs toward flood-protection work. The single most important rule: pre-approval from the City is required before any work begins.

What the program pays

The City of St. Catharines Emergency Flood Alleviation Program (Emergency FLAP) reimburses 90% of eligible costs, to a maximum of $5,000 per property. This is a second, distinct program from the older standard FLAP, which shares the identical cap and coverage rate. Verify the current program status and any deadline directly with the City before applying; program details can change.

Pre-approval is required before any work begins

Work must not begin before the application is approved. If work is completed before the required permit is in place, the property owner is required to obtain a permit retroactively, a process that may involve additional fees, inspections, excavation, camera assessments, or the exposure or removal of completed work to verify compliance with applicable codes, standards, and general permit requirements, all at the owner's own cost. Per the City's own wording, this will affect the eligibility of the work and associated costs for funding. It is a real consequence, not framed as an automatic, unappealable disqualification.

The weeping-tile requirement, not a valve alone

To be eligible for the rebate, all weeping tile connections to the sanitary lateral must be disconnected and redirected to a sump pit; a standalone backwater valve installation does not on its own satisfy the program. See the St. Catharines backwater valve page for the eligible valve type, the exclusions, and the Ontario Building Code rule behind them.

Eligibility, in general terms

The program covers residential property owners on the municipal sewer system, within City limits. Renters are not eligible; the registered property owner must be the applicant. Property type and age are also hard gates, not soft factors: the property must be a single-detached, semi-detached, duplex, triplex, or quadplex home constructed before 2012. A newer home, or one outside these property types, does not qualify regardless of the flooding it has experienced. Confirm your specific property against these criteria directly with the City's Water Utilities office before applying.

Funding is approved, and payment follows the closed permit

Council approved $20 million for Emergency FLAP on August 26, 2026, and the City says this confirms there is funding to support applications. The rebate is paid only after the Plumbing-Only permit is closed following a passed inspection and the final paid invoice is submitted. Verify current program status with the City before relying on the rebate to offset your cost.

How to vet a contractor for this work

The work must be completed by a licensed plumber. Plumbing is a compulsory licensed trade in Ontario, so ask for the certificate of qualification before hiring. A WSIB clearance certificate is worth requesting, though its absence is not automatic disqualification: someone working alone, with no employees, and hired directly by the homeowner for repair or renovation work on their home can be exempt from WSIB coverage. A business with employees still has to cover its workers. Under the Consumer Protection Act, 2002, a supplier who gives a written estimate cannot charge more than 10 per cent over it without your agreement to a documented change.

About this guide

This St. Catharines flood-rebate guide is one of the proof pages behind Living Websites' own engine. It was written and is kept current by a living website, the same kind of self-updating site we build for Niagara businesses, not by a person editing it by hand.