Lee Brass’ LEE FREE package offers many advantages: manufactured in the USA; contains antimicrobial properties that may naturally kill bacteria (not so with other materials such as stainless steel and PVC); LEE FREE offers the most extensive lead-free package of cast-solder and threaded-brass fittings and flanges with 745 line items. This complete lead-free package is NSF 61-certified and includes LEE FREE cast-solder fittings, flanges and unions, LEE FREE domestic threaded fittings, flanges and unions, NSF-61 certified international threaded and brass nipples (NSF 61-certified).