Backwater Valve Installation Subsidy

Page Summary

In the event of heavy rainfall, homes that do not have a backwater valve installed on their underground pipes are at a greater risk of sewer back up and basement flooding.

What is a backwater valve?

A backwater valve is a device installed on your sewer lateral that prevents wastewater from re-entering your house.

What financial support will Halton Region provide?

Halton will cover 50% of the costs to install a backwater valve, up to a maximum of $675.

A sideview of a backwater valve; one side is missing to show inside the pipe.
Backwater valve

Apply for the backwater valve subsidy

  1. Download the Enhanced Basement Flooding Prevention Subsidy application, or pick one up at the Halton Regional Centre.
  2. Apply to your local municipality for a permit to conduct work. Once the work is completed, arrange for an inspection and obtain documentation from your local municipality ensuring the work meets the Ontario Building Code standards.
  3. Have your contractors provide a written statement indicating that your weeping tiles are not connected to the sanitary sewer system.
  4. Submit a completed application and include the required documentation as outlined in the application form.
    • Scan and email to basementfloodingsubsidy@halton.ca
    • Drop off in person at the Halton Regional Centre, 1151 Bronte Road, Oakville.
    • Submit by mail to
      The Regional Municipality of Halton
      Public Works, Wastewater Services
      c/o Systems & Outreach Administrator
      Woodlands Operation Centre
      1179 Bronte Road, Oakville ON, L6M 4G3