Are any other backflow assemblies required for residential homes?

All outdoor faucets and hose bibs that have threaded connections where a garden hose can be attached should have backflow prevention protection. This may be in the form of a frost-proof automatic draining outdoor faucet with a built-in backflow preventer or by the use of a screw-on hose bibb vacuum breaker (HBVB) that can be purchased at local hardware or home supply stores.

Note: Customers should take necessary actions to ensure that their backflow prevention assembly or plumbing does not get damaged during freezing temperatures.