1 Scope

1.1 These requirements cover angle-pattern and straightway-pattern hose valves intended for use on standpipes, fire pumps, and hydrants supplying water for fire protection service.

1.2 Requirements for the installation of hose valves include the Standards of the National Fire Protection Association for the Installation of Sprinkler Systems, NFPA 13; for Standpipe, Private Hydrants, and Hose Systems, NFPA 14; for Installation of Stationary Fire Pumps for Fire Protection, NFPA 20; and for Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24.

Summary of Topics

This revision to ANSI/UL 668 dated October 8, 2021 was issued to incorporate the following changes:

– Language explicitly permitting stainless steel construction or grooved connections; 7.1, 7.2, 11.3, 15.4 and 17.5

– Friction loss of hose valves; Section 25A and Section 28