Compression | Insert Barb x MIP | Socket Weld x MIP | Threaded True Union | Threaded x Threaded | Threaded | 1-1/2" x 1-1/4" | 1-1/4" x 1-1/4" | 2-1/2" | 2" x 1-1/2" | 2" | 3/8"-5/16"-18 | 9.1" x 16.8"