Pipe, Fittings, and Flanges | Bulkhead Tank Fitting | Insert Barb x Insert Barb | Insert Barb x MIP | Threaded x Threaded | Threaded | 1-1/2" x 1-1/4" | 1-1/4" x 1-1/4" | 2" | 3" x 1-1/2" | 4" x 2-1/2" | 8" - 3" x | 12" - 6" x