A building permit is required to install a backwater valve.
Backwater valves prevent the flow of sanitary or storm sewage back into your home. If storm water or sewage flows backwards from city sewers, the backwater valve closes to stop from entering your home. They are especially helpful in times of flooding or heavy rain.
Submit your application online in ePlans using the “building permit” request type.
Drawings and documents are not required for a backwater valve permit application. This video explains how to apply, or read the instructions that follow.
Application Request Confirmation page displays with temporary project number.
Click Home. Wait five minutes, you will receive application upload requirements email.
Your application is now in pre-screen review. You will receive emails with more instructions once staff have pre-screened your project.
A $20 administrative fee is required to submit your application in ePlans. No additional fees are required.
Once we receive your application, your backwater valve permit should be issued within approximately three business days.
You will receive emails on how your application is progressing, including once your permit has been issued.
Once your device is installed, you can schedule a plumbing inspection.
For more information, call 311 (905-615-4311) or complete a service request online.