Min 8"-Max 12" (203mm-305mm) Min1-5/8 " -Max2-1/4 " (40mm-60mm) 4-1/2-14NPT-2A 2"-4" (51mm-102mm) 6-1/2" (165mm) Do not use 6-7/8" (175mm) 5-1/2" (140mm) Recommended 74” (1880mm) Minimum From Floor To Showerhead, Or Greater As Desired ) 6" m m 52 (1 PEX for tub spout drop.