Grooving is 4 to 10 times faster to assemble than threading, welding, sweating copper.â¢Grooved plumbing allows for easy disassemling and reassembling of pipe and valvesâ¢Stainless Steel Kwik-Fit Rigid no flex grooved Couplingâ¢Stainless Steel Push to fit Rigid no flex grooved Couplingâ¢Kwik-Fit Rigid no flex grooved Coupling SSâ¢Push to fit Rigid no flex grooved Coupling Stainless Steelâ¢Grooved coupling Rigid Stainless steelâ¢Rigid No Flex Coupling Stainless Steelâ¢Corrison Resitant Grooved Coupling Rigid Stainless.