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- Anti-Siphon Auto Vent, Series: 239, 1-1/2 in MNPT, ABS, Domestic
- For secondary venting only
- Each drainage system must have a main vent stack
- To be installed in a readily accessible location with free flow of air, never in a sealed wall cavity
- Sealing disc of auto vent must be located at least 6 in above the top of the trap are
- Two fixture may be drained by a common 1-1/2 in drain pipe
- Three or more fixture will require a 2 in drain pipe
- Connection TypeMNPTDomestic / ImportDomesticMaterialABSManufacturerSioux ChiefManufacturer #239Nominal Size1-1/2 inSeries239TypeAuto Vent