Get 1" Copper tube adapters for Autotrol systems. You'll receive one tail per order, they are not sold in pairs.
Our 1" Copper Adapter Kit Comes with 1 copper tube.
These are used to connect to Autotrol Valves (examples 163, 168, 263, 268) directly or to any Autotrol By Pass. Other units that they're used on are Autotrol 155 and 255 By Pass valves (also the version 256)