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- For use as a secondary vent
- One size approved to handle up to 4 in vent pipe
- Opens/closes as needed by building's plumbing system
- PVC with 2 in NPT threads valve
- Neoprene tension membrane
- 2 x 3 in PVC or ABS adapter
- Rated 160 DFU's for venting DWV 4 in and smaller
- Sweet Spot™ technology opens at 0.01 psi and seals at 0 psi and above
- Body MaterialPVCEnd StyleNPTFlow Rate160 DFUNominal Size2 x 3 inDimensions6.09 in HInlet to Outlet Length1.88ManufacturerOATEYManufacturer #39221Temperature Rating-40 to 150 deg F