NFPA 13 (2016) requires air vents on all wet pipe fire sprinkler systems. AGF offers the most economical, purpose-built manual air vent on the market and automatic air vents that have flexible installation options and do not leak.
NFPA 13 (2016)
7.1.5 Air Venting
A single air vent with a connection conforming to 8.16.6 shall be provided on each wet pipe system utilizing metallic pipe.
8.16.6* Air Venting
The vent required by 7.1.5 shall be located near a high point in the system to allow air to be removed from that portion of the system by one of the following methods: