This program was implemented to protect drinking water from FVRD water systems from contamination that may be caused by backflow.

Typically, water flows in one direction from the drinking water system into a building. Under certain circumstances, such as a water main break, negative pressure can be created, causing water to flow in the opposite direction. This is called backflow. If a cross connection exists, backflow can cause contaminated water to flow back through the drinking water system, which can result in dangerous health risks.

A cross connection is any temporary or permanent connection between the drinking water system and a source of non-potable (contaminated/polluted) water. Examples include irrigation and sprinkler systems, piping between the public water system and a cooling system, or something as simple as a garden hose left in a sink or pool.

There are several backflow prevention devices that can be installed on cross connections to prevent water from backflowing into the water distribution system. Most residential properties connected to an FVRD water system already have dual check valves installed in conjunction with their water meter assemblies.

Commercial operations connected to a FVRD water system require one of the following backflow prevention devices to be installed:

• Dual Check Valve
• Double Check Valve
• Hose Connection Vacuum Breaker
• Reduced Pressure Assembly
• Approved Air Gap

Once installed, annual inspections must be carried out by a certified inspector who will also complete and submit this Backflow Assembly Test Form to the FVRD. To find a certified inspector, please call 604-702-5000 or email the FVRD’s Engineering Department.