20 DFU (Drainage Fixture Unit) capacity. Complies to ASSE (American Society of Safety Engineers) Standard 1050 and 1051 for use a a secondary vent. One size approved to handle up to 3" vent pipe. Opens and closes as needed by building's plumbing system, 1-1/2 - 2".
| Id | 16678 |
| SKU | 401321 |
| PartNo | 39017 |
| UPC | 00038753390178 |
| Country of Origin |  USA |
| Connection Size | 1-1/2 In. to 2 In. |
| Connection Type | Mechanical |
| Schedule | 40 DWV |
| Material | PVC |
| Type | Air Admittance |
| Use on Diameter Branches | Up to 3 In. |
| CID | 1 |
Chattanooga, TN