The only approved backflow assembly for irrigation/sprinkler systems is the Reduced Pressure Zone Assembly (RP, RPZ). RPs require annual testing by a state certified backflow technician. In addition to the RPs vacuum breakers are recommended for all hose outlets. These can be purchased at most sprinkler supply or hardware stores.

Secondary Water Connection Only

Description: Connection exists between the secondary water system only. The culinary water stop-and-waste valve must be completely removed and inspected by a City inspector.

Backflow Prevention Requirements: No backflow preventer is required after an inspection verifying the discontinuation of culinary water is conducted by the City. In addition, vacuum breaker devices must be installed on all hose outlets.

Culinary Water Connection Only

Description: Connection exists between the culinary water system only.

Backflow Prevention Requirements: Reduced Pressure Zone Assembly (RP, RPZ) is required. In addition, vacuum breaker devices must be installed on all hose outlets.

Culinary or Secondary Connection

Description: Connection can exist between the culinary or secondary water system. The system is setup to receive water from both sources depending on secondary water availability and can at no time be connected to both.

Backflow Prevention Requirements: A Reduced Pressure Zone Assembly and swing joint connection are required. No exceptions! In addition, vacuum breaker devices must be installed on all hose outlets.