1 Scope

1.1 These requirements cover backflow special check valves of 3/4 through 12 NPS (nominal pipe size) used in piping systems supplying water for fire protection service.

1.2 The backflow special check valves covered by these requirements are intended for installation and use in accordance with the Standards for:

1. a) Low Expansion Foam and Combined Agent Systems, NFPA 11;

2. b) Installation of Sprinkler Systems, NFPA 13;

3. c) Installation of Standpipe and Hose Systems, NFPA 14;

4. d) Water Spray Fixed Systems for Fire Protection, NFPA 15;

5. e) Installation of Centrifugal Fire Pumps, NFPA 20;

6. f) Water Tanks for Private Fire Protection, NFPA 22; and

7. g) Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24.

Summary of Topics

This new Third Edition UL 1469 dated December 4, 2025 is issued to update the Scope and to also include editorial updates to align with current style.