Back-flow preventers on automatic sprinkler systems are typically required by the plumbing code.

Back-flow preventers on automatic sprinkler systems are typically required by the plumbing code.

• A. True
• B. False
• C. Not specified
• D. Optional

Answer: (A)

Backflow prevention is installed to keep the potable water supply from being contaminated by water from the sprinkler system. When an automatic sprinkler system ties into a public water main, pressure changes or backpressure can push system water back into the drinking water supply. The plumbing code requires a backflow prevention device at the connection to the public water supply, and this device must be installed and tested to ensure it operates correctly. Typical systems use devices like RPZ or double-check assemblies, placed where the sprinkler system connects to the water main. While there can be rare exceptions (such as isolated or non-public supplies), in most cases the code requires backflow prevention. So, the statement is true.

Backflow prevention is installed to keep the potable water supply from being contaminated by water from the sprinkler system. When an automatic sprinkler system ties into a public water main, pressure changes or backpressure can push system water back into the drinking water supply. The plumbing code requires a backflow prevention device at the connection to the public water supply, and this device must be installed and tested to ensure it operates correctly. Typical systems use devices like RPZ or double-check assemblies, placed where the sprinkler system connects to the water main. While there can be rare exceptions (such as isolated or non-public supplies), in most cases the code requires backflow prevention. So, the statement is true.