The FM Approved UNITED Fire Systems Model AR-1 Air Vent for Wet Sprinklers is a device for automatically releasing the trapped air from the high point(s) of a wet sprinkler system.
Trapped air contains oxygen, which, when combined with water, is the primary cause of internal pipe corrosion. This corrosion can lead to pipe blockage, leaks, and pipe failure.
The Model AR-1 Air Vent is installed at the system high point(s). Air is vented until water reaches the internal float valve, which automatically closes the device to prevent water release.
To learn more about our Air Vent for Wet Sprinklers, give us a call at 908.688.0300 or contact UNITED Fire Systems online.
The 2016 edition of NFPA 13, Standard for the Installation of Sprinkler Systems, requires a method to vent trapped air in all new wet pipe sprinkler systems. The language of this requirement is:
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.
220.127.116.11 – Venting from multiple points on each system shall not be required.
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 using one of the following methods: Manual valve, minimum 1/2″ size, Automatic air vent, or Other approved means.
Give us a call at 908.688.0300 or contact us online to request more information about our Sprinkler Accessories.
For .DWG and .DOC versions of these documents, download our Specification Developer
If you have a dry standpipe in your structure, can you tell if it’s intact and ready for fire department use? If it’s not, the risk is high. Be sure – a UNITED Fire Systems STANDPIPE-PAC™ system will alert you if someone accidentally leaves a valve open or even disassembles a portion of the standpipe inadvertently.