A0085 Vent Adapters Vents - A0085 Vent Adapters The Emco A0085 is used with A0084 2” vents to connect to 3” riser pipes. Available in thread-on and slip-on versions. Aluminum construction. Material Body: Aluminum Seal: Buna Sales Literature Catalog Model No. Description Lbs. A0085-302 3" Thread-on 0.6 A0085-302S 3" Slip-on 0.6 A0085 Vent Adapters A0085 Thread-on Section View A0085 Vent Adapter, Slip-On A0085 Slip-on Section View, incorporates 2 set screws.