The male adapter features a solder cup and male NPT thread. These fittings provide a means for adapting a solder connection to a threaded connection. NIBCO copper fittings are manufactured in an ISO 9001 certified facility, and backed by a 50-year limited warranty.Lead-free wrot copper solder pressure male adapter is used in residential and commercial systems such as potable water, air conditioning and refrigerationDezincification resistantLead-free wrot copper solder pressure male adapter is durable and low maintenanceOptions also include cleaned and bagged for oxygen service medical gasMSS SP-104ASME B16.22Third-party certified to NSF/ANSI 61 and 372