The FM approved UnitedFire SystemsModel AR-1 Wet-Pipe Fire Sprinkler System Air Release 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 FM approved United Fire Systems AR-1 air release 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 Sprinkler Accessories, give us a call at 908.688.0300 or contact UNITED Fire Systems online.
Features & Benefits of Model AR-1 Wet-Pipe Fire Sprinkler System Air Release
FM approved – Complies with NFPA 13 component listing requirement
Dielectric union – Prevents dissimilar metal corrosion
Ball valve – Allows AR-1 servicing without sprinkler system shutdown
Float valve – Automatic shutoff of the outlet when air is vented and water reaches the device
Strainer – Protects float valve from particulate matter that could contaminate valve seat
Outlet tubing connection – Provides optional connection for remote draining
NFPA 13 Requirements
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.
126.96.36.199– Venting from multiple points on each system shall not be required.
8.16.6Air 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:
Certifications and Approvals
The Model AR-1 Air Release is approved by Factory Mutual (FM) and listed with the California State Fire Marshall (CSFM). Below are links to each of these documents in PDF format.
Give us a call at 908.688.0300 or contact us online to request more information about our Sprinkler Accessories.
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Did You Know?
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-PACsystem will alert you if someone accidentally leaves a valve open or even disassembles a portion of the standpipe inadvertently.