Backflow Prevention – What is it and do I need it?

Backflow is the flow of contamination or pollution into the drinking water distribution pipeline.  Backflow can be caused by backsiphonage or backpressure.  A backflow prevention device installed on your private plumbing system will prevent dirty water from getting into our clean water system.  Not all homes require a backflow device.  If your private plumbing system is connected to a device that can potentially cause a backflow hazard, you need a backflow preventer. Common systems that require a backflow preventer are: Underground irrigation system, dedicated fire sprinkler system, sewage pumping facilities or grey water system, private well or a swimming pool or spa with automatic refill.

• Backflow Information
• How does the backflow preventer work?
• What is backflow prevention?
• For a list of Backflow Testers: Click Here

Emergency Preparedness – Are you Ready?

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Click on the links below for handy how-to articles about water-related topics:

• Call Before You Dig
• How to Find and Fix Leaks Around the Home – how-to videos for toilets, indoor and outdoor faucets
• How to Flush Your Home’s Hot Water Heater
• Water Saving Rebates – from Saving Water Partnership
• Building Healthy Soil
• Watering & Irrigation
• Natural Pest and Weed Control
• Savvy Gardener Classes – FREE from Saving Water Partnership

Related Organizations

• Saving Water Partnership
• Seattle Public Utilities
• Seattle Water Supply Operating Board