Premise isolation backflow prevention device

The requirement for premise isolation backflow prevention is mandated by Water By-law 2019-74, schedule “I” (as amended). Where a premise isolation backflow prevention device is installed in a location with moderate to severe risk of backflow, the device must also be registered with the City’s Backflow Prevention Program.

Please refer to Backflow Prevention Program for an overall description of the program and its requirements.

Cost

Building Code Services administration costs include a building permit fee starting from $103.

• Please refer to Application fees

Approximate timeline

Plumbing only - First review five business days, Council approved timeline.

Building Code Service counters are open for personal services by appointment and walk-in. This includes the submission of permit applications, payment of fees and the issuance of permits. 

There are various methods for submitting applications.

A building permit application can be filed at any one of our Client Service Centres. The following items shall be included in the building permit application submission package: 

• Completed building permit application form and fee payment, and two sets of: 
  • A completed survey of premise isolation 
  • Site plan (indicating municipal address, lot area, main building area, addition area, location of proposed addition dimensioned to other existing buildings on the property, lot lines and septic system, where applicable) 
  • Building key plan (indicating water service entry room location(s)) 
  • Proposed plumbing schematic
• Permit Application guidance document [ PDF 286 KB ] for the Installation of a premise isolation backflow device in an existing building
• Application for a Permit to construct or demolish [ PDF 270 KB ]
   

Issuance of permits

Permit applicants will be contacted when the permit is approved for issuance.

If your application was previously approved, clients are requested to contact Building Code Services at 613-580-2424, extension 29312 or send an email to buildingpermits@ottawa.ca to coordinate the issuance of their permit.

Required inspections

Permit holders are encouraged to speak directly with their assigned inspector regarding options for an inspection.

Your building inspector must confirm that the new or relocated backflow assembly complies with the requirements of the Ontario Building Code and the referenced standard, CSA B64.10-17 for Premise Isolation. Additionally, the inspector must verify the device has passed testing by a qualified tester as described in the amended Water By-law.

The permit plans and specifications must be on site and made available to the building inspector at the time of inspection. To ensure the availability of a building inspector, you should book your inspection 48 hours in advance. The building inspector name and phone number is identified on the building permit.