Potter Electric Signal (PAV) Air vent

The Potter Electric Signal PAV is an automatic float-type air vent for wet-pipe fire sprinkler systems. First, the vent automatically releases trapped air during system fill. Then, the float closes the vent when water reaches it. As a result, the system retains far less air at the water interface.

Why the Potter Electric Signal PAV matters

Trapped air drives corrosion in wet-pipe sprinkler piping. Specifically, the air/water interface is where corrosion activity concentrates. Therefore, removing system air protects pipe wall thickness and extends service life.

In addition, trapped air can delay vane-type waterflow detectors. Sometimes, it can prevent activation entirely. As a result, an air vent supports both corrosion control and faster waterflow alarm response.

NFPA 13 air venting requirement

The 2016 edition of NFPA 13 added section 7.1.5. Specifically, that section requires a single air vent on each wet-pipe system using metallic pipe. Furthermore, NFPA 13 section 8.16.6 lists three approved methods. The first option is a manual valve at 1/2 inch minimum. Alternatively, an automatic air vent may be used. Also, another approved means may satisfy the requirement. Therefore, the PAV satisfies the automatic air vent option for code compliance.

Verified specifications

• UL Listed and FM Approved for wet-pipe fire sprinkler systems
• Meets 2016 NFPA 13 section 7.1.5 air venting requirement
• Automatic float operation (no electrical supervision required)
• Reduces corrosion activity at the air/water interface
• Reduces waterflow alarm ring delay
• Reduces alarm cycling on systems prone to air buildup
• Stock number: 1119720

Note: For installations needing secondary shutoff and a containment pan, the Potter PAAR-B (stock 1030001) is the available alternative.

For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com