The FM Approved Model AR-1 is the answer to your corrosion problem!


The FM Approved UNITED Fire Systems Model AR-1 Wet-Pipe Fire Sprinkler System Air Release is the answer for avoiding wet-pipe system internal corrosion AND complying with NFPA 13.

Features and Benefits:

• 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 outlet when air is vented and water reaches device.
• Strainer – Protects float valve from particulate matter that could interfere with valve seat.
• Outlet tubing connection – Provides optional connection for remote draining.

Trust UNITED Fire Systems for your sprinkler corrosion needs. We have more combined experience in fire sprinklers AND corrosion prevention technology than anyone! No one else puts it ALL together….

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. 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:
  1. Manual valve minimum 1/2” size
  2. Automatic air valve
  3. Other approved means.
See a full list of features and documentation here.



Contact Our Team