NIBCO 10-Pack 1/2-in Copper Slip Cap Fittings Tube caps permanently cap tubing Solder connections Dezincification resistant Third party certified to Annex G of NSF/ANSI 61 (180F commercial hot) Wrot copper solder joint pressure fittings are produced to 1 of the following specifications: material and workmanship ASME/ANSI B16.22; dimensional, material, and workmanship of MSS SP-104 or MSS SP-109; certified to NSF/ANSI 61