Libra Supply 1-1/2 inch(Nominal Size) Copper Male Adapter Solder Joint, C x MIP, (Pack of 5 pcs, click in for more size options)1-1/2'', 1-1/2-inch Copper Pressure Pipe Fitting Plumbing Supply For aboveground and belowground use Adapts to standard female pipe threads For use with type M and type L hard temper copper tubing Fitting ID Size: 1-5/8'' (OD 1-3/4''), Fitted Pipe ID Size: 1-1/2'' (OD 1-5/8'') Requires pressure to maintain water flow