Section 608.1/Backflow Prevention (2024 Edition)
IPC 2024 Section 608 covers backflow prevention with updated ASSE standards and expanded water reuse cross-connection provisions.
The 2024 IPC updates Section 608 to reference current ASSE device standards for backflow preventers. Reduced pressure zone assemblies, double check valve assemblies, and atmospheric vacuum breakers must comply with the updated ASSE standards. The 2024 edition clarifies the application of backflow preventers at connections to fire sprinkler systems, rainwater harvesting systems, and graywater systems. Cross-connection definitions are expanded to address emerging water reuse systems. The fundamental principle remains: the degree of hazard determines the type of backflow preventer required.
Key changes from IPC 2021
The 2021 IPC referenced older ASSE standards for backflow prevention devices. The 2024 edition references the consolidated ASSE Series 1000 standards. New provisions address cross-connections with on-site water reuse systems (rainwater, graywater, reclaimed water) that were not explicitly addressed in 2021. The 2024 edition also aligns more closely with the EPA Cross-Connection Control Manual for hazard assessment methodology.
What plan reviewers look for
Plan reviewers check the backflow prevention schedule for the correct device standard references (ASSE Series 1000 under the 2024 IPC). They verify that connections to water reuse systems include the appropriate backflow protection. They check that the degree of hazard assessment considers all cross-connections, including those to newer systems (rainwater harvesting, graywater) that may not have been evaluated under the 2021 edition.