The 45? elbow features a solder cup and male solder end. The fitting provides a means of changing the pipe line direction by 45?. 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 45? elbow is used in residential and commercial systems such as potable water, air conditioning and refrigerationDezincification resistantLead-free wrot copper solder pressure is durable and low maintenanceMSS SP-104ASME B16.22Third-party certified to NSF/ANSI 61 and 372