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The purpose of the program is to protect the drinking water supply from contamination and pollution. The common cross connections that require backflow assemblies are underground irrigation systems, commercial boiler systems, residential and commercial boiler systems with anti-freeze and fire suppression systems.

The most common cross connection found in a residential home is a garden hose connected to a pesticide/fertilizer sprayer or pressure washer, a garden hose left submerged in an ornament pool, or an underground lawn watering (irrigation) systems.

Backflow prevention assembly is a mechanical device that prevents backflow of water into the public drinking water system. The devices have internal seals, springs and moving parts that are subject to being plugged by grit, fouling and wear. Therefore, these devices require annual inspection, maintenance and testing. These devices can only be tested by a British Columbia Water and Waste Association (BCWWA) -certified cross connection tester.

It is the owner of the property or agent of the owner’s responsibility to hire a BCWWA-certified tester to perform the test. The Test Report (PDF, 141 KB) must be submitted to the University Endowment Lands (UEL) Administration Office. Failure to comply may result in a discontinuation of water service and municipal services to the property.

New irrigation systems installed and tested after September 30th of each year do not require an additional test in the spring of the following year. This policy does not apply to existing devices and to property owners who have been notified and are late submitting tests.

The UEL Cross Connection Control Program is administered and enforced in accordance with Schedule 10: Cross Connection Control of the Land Use, Building and Community Administration Bylaw.