Ejector Automatic

Automatic Air Vent

The simplest, most cost-effective approach to reduce corrosion in wet pipe sprinkler systems is to exhaust trapped gas with an ECS Ejector Automatic Vent (PAV-W) also known as a venting system or automatic air vent. Trapped gas contains 21% oxygen which can cause severe internal damage to your fire sprinkler system piping. The relationship between oxygen and corrosion is linear – remove 50% of the trapped oxygen in your system and reduce corrosion activity by 50%. Specifically designed for new and existing fire sprinkler systems, the PAV-W offers the lowest clear height for any redundant vent in the industry, and redundant floats mean you don’t have to plumb this device to a drain. The automatic air vent allows gas to escape the system through the device while a float valve seals closed once water reaches the device.

FM Approved meets the new NFPA 13 vent requirement and is for use under U.S. Patent No. 8,636,023.

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Automatic Air Vent PAV-W
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PAV-W Specs

  • FM Approved
  • UL Listed
  • Meets NFPA 13 vent requirement
  • 40°F to 270°F (4.5°C to 132°C)
  • 14” x 7” x 7” (W x D x H), 8 lbs
  • Industry best 5” clear height
  • 1/2” MNPT system connection
  • Rated for 175 psi
  • No plumbing to drain required
  • Available supervised model for remote monitoring (PAV-WS)


PAV-W Product Spec Sheet

Product Demo