Hymax 2 862-54-0334-16 ND 12" EPDM Flip Long Body Coupling 13.15-14.41 O.D.Wide Range HYMAX 2 Flip Long Body Coupling is used for pipe section replacement and connects two pipes of the same or different OD pipe circumferences and materials which covers a wider gap between the pipes with up to a 2. 1" range. Long couplings are typically used when there is uncertainty regarding the gap between the pipes. Hymax 2 Flip Long Body Coupling Features 862 54 0108 16; 4. 0" EPDM Flip Long Body Coupling Advanced Wide Range Coupling