- For use as a secondary vent
- Tubular adapter
- One size approved to handle up to 2" vent pipe
- Vents up to 24 DFU Branch or 8 DFU Stack
- Sweet Spot™ technology opens valve at -0.01 psi and seals at 0 psi and above
- Screening on air inlets to guard the seal
- Protective sleeve provides grip for installation and keeps valve free from debris
- 100% functionally tested at ¼" H2O and 30" H2O ensuring trouble free performance