1.1 These requirements cover valve equipment intended for installation in piping systems to supply water automatically to dry pipe, deluge, and pre-action sprinkler systems for fire-protection service.

1.2 Valves covered by these requirements may be a differential type, latched-clapper type, or a combination of these types.

1.3 The valves covered by these requirements are intended for installation and use in accordance with the following standards:

1. a) Standard for Low-, Medium-, and High-Expansion Foam, NFPA 11.

2. b) Standard for the Installation of Sprinkler Systems, NFPA 13.

3. c) Standard for the Installation of Standpipe and Hose Systems, NFPA 14.

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

5. e) Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems, NFPA 16