Cross Connection Test

Backflow Prevention Test
The City of Calgary and municipalities across Alberta oversee annual testing and compliance of devices in order to protect the drinking water supply from contamination

Testing is mandatory at the beginning of each season as per City of Calgary By Law 39.3e to prevent water contamination

Looking for the lowest price and worry-free schedule? Try our Cross Connection Test Membership

What is Backflow ?

It essentially means the flowing back of water or reversal of the normal direction of water flow in either the Water System or a Customer’s Plumbing system into the public domain or water source

What actually happens?

Water flows from the public line into your home everyday. The average person in Calgary consumes 7,000 litres of water per day. Depending on the devices and water needs your home might need contaminated water may find itself back into the water supply without you even noticing it!

Certified Testing Procedure

If you received a letter, you need to have your cross connection device tested by a certified tester who is registered with the City of Calgary. In order to pass the test, it must meet the following criteria:


  1. The Device Must Be appropriate to the Static Pressure of the line it is installed on
  2. The First Shut Off Must Close
  3. Check Valve 1 must close tight in the direction of flow
  4. Check Valve 2 must close tight in the direction of flow
  5. The second Shut Off Must close


In addition, the device must also be installed as per AWWA recommendations. AWWA stands for the American Water Works Association which is recognized as North America’s most prominent water inspection association.

An improperly installed device can result in the immediate failure of a device both in terms of operation and testing.

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