Studor 20380 Low-Profile Recess Box with Grille

Studor 20380 Recessed Air Admittance Valve Box and Grill

Studor 20346 Redi-Vent Air Admittance Valve with PVC Adapter, White, 1-1/2- or 2-Inch Connection

Oatey Sure-Vent 1-1/2 in.–2 in. 160 Branch, 24 Stack DFU Air Admittance Valve with White PVC Sch. 40 Adapter