Double Check Valve Assemblies | Insert Barb x MIP | Threaded x Threaded | Threaded | 1-1/2" x 1-1/4" | 1-1/4" x 1-1/4" | 2" x 1-1/2" | 2" | 4" x 2-1/2" | 8" - 3" x | 20 ounce