- For use as a secondary vent
- PVC Schedule 40 Adapter
- One size approved to handle up to 3" vent pipe
- Vents up to 160 DFU Branch or 24 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