Brand: STUDOR by IPS Corporation | Manufacturer Part Number: 20346 | Big Frog Supply SKU: 20346 Product Overview The STUDOR Redi-Vent 20346 is a compact air admittance valve with a PVC adapter for compatible 1-1/2-inch and 2-inch drain, waste, and vent piping. It is designed for single fixtures, kitchen sinks, and bathroom fixture groups—including approved back-to-back applications—where an AAV is allowed by the applicable plumbing code. When water discharge creates negative pressure, the one-way valve opens to admit air into the DWV system. When pressure equalizes, gravity closes the valve to help keep sewer gases from circulating back into the occupied space. The Redi-Vent can serve fixture groups up to 20 drainage fixture units in approved branch applications and is compact enough for many tight under-sink or concealed-access installations. Its exclusive vermin-protection system helps protect the valve opening, while the included PVC adapter supports either 1-1/2-inch or 2-inch connection sizes. Air admittance valves must remain accessible and able to receive air; they are not intended to be permanently sealed inside an inaccessible wall or cabinet. Key Features Compact air admittance valve for 1-1/2-inch or 2-inch PVC piping Suitable for single fixtures and bathroom groups where code permits Supports approved applications up to 20 DFUs Automatic one-way air-admittance operation Exclusive vermin-protection system PVC adapter included Residential or commercial use Common Uses Kitchen sink venting Bathroom fixture groups Back-to-back fixture arrangements where approved Compact DWV installations that permit an AAV Technical Specifications Manufacturer model: 20346 Pipe sizes: 1-1/2 inches or 2 inches Adapter material: PVC Maximum approved branch application: Up to 20 DFUs Approximate dimensions: 3.75 × 3 × 3 inches Standards/listings: ANSI/ASSE 1050 and 1051, NSF 14, ETL, ICC-ES PMG-1025, and applicable listed approvals Installation Notes Install vertically in an accessible location with adequate air movement and the clearances required by STUDOR instructions and local code. Only thread-seal tape may be used on threaded valve connections; primer, solvent cement, or pipe dope on the valve threads can damage the product and void warranty coverage. Confirm local approval before using an AAV in place of conventional vent piping. Frequently Asked Questions Does the Redi-Vent fit both 1-1/2-inch and 2-inch pipe? Yes. Model 20346 includes a PVC adapter for compatible 1-1/2-inch or 2-inch connections. How many DFUs can it serve? STUDOR identifies the Redi-Vent for approved fixture-group applications up to 20 DFUs. Can it be sealed permanently inside a wall? No. The valve must remain accessible and able to receive air. Can pipe dope be used on its threads? No. STUDOR specifies thread-seal tape only on valve threads. Why Buy This Product from Big Frog Supply? The STUDOR 20346 is the compact Redi-Vent for 1-1/2-inch and 2-inch PVC systems, not the larger 3- to 4-inch Maxi-Vent. Big Frog Supply clearly identifies its connection sizes, 20-DFU application, accessibility requirement, and approved sealing method before purchase.
