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Frequently Asked Questions
What is a Backflow assembly?
Backflow prevention assembly. A Backflow prevention assembly or backflow preventer is a mechanical valve arrangement, which is designed to prevent the "backflow" or reversal of flow of water, once it has passed through the valve. There are different types of backflow preventers for different uses, and different degrees of hazard.
Why do I need to test my Backflow Assembly?
Backflow prevention assemblies are installed to protect your drinking water from potential sources of contamination. The only way to ensure that they are working properly is to have them tested annually by a Washington state certified Backflow Assembly Tester. It’s also the law.
How does a backflow occur ?
Backflow is the undesirable reversal of flow in a water distribution system. Backflow may allow liquids, gases, and other substances, from any source, to enter a public water system. How does backflow occur? Backflow may occur due to high pressure on the customer side, or low pressure in the water system.
What is a Cross Connection ?
A Cross Connection is an actual or potential connection between the safe drinking water (Potable) supply and a source of contamination or pollution.
How do I prevent a Cross Connection?
To prevent cross-connections from occurring, follow these precautions: Install an approved backflow prevention assembly on any cross-connected systems, test upon installation and annually by a state certified backflow tester. Never submerge a garden hose in a bucket, sink, or anything else.