Preventing backflow in your home
You can help prevent backflow in your home by following these tips:
- Never submerge a hose in any container holding liquid, including a sink, swimming pool, or fish tank. Leave at least a one-inch gap between the end of your hose and the liquid.
- Never attach a fertilizer or pesticide sprayer to your garden hose without a hose connection vacuum breaker.
- Buy and install hose connection vacuum breakers on all threaded faucets around your home. These devices are inexpensive and are available at most home improvement stores.
- Never put your garden hose down a floor drain to flush out debris when it's backed up.
- If you have a pool or spa with a permanently installed fill line, make sure a backflow prevention device is properly installed in the line connected to your plumbing system.
- Install a backflow prevention device on all in-ground lawn irrigation systems.
- If your home has a heating boiler, install a backflow prevention device on the water supply to the boiler. The type of device will depend on whether chemicals (e.g., anti-freeze solutions, corrosion inhibitors) have been added to your home boiler.
For more information, contact 311.
Last updated: June 29, 2018