Arrowhead Brass Sillcocks, with Arrow-Breaker Technology, is made of heavy-pattern lead-free brass and are available with various inlet connection types and options to fit your needs. The patented Arrow-Breaker Technology protects your water supply with an Integrated (Built-In) Anti-Siphon Vacuum Breaker that prevents back-siphonage/backflow and eliminates the needs for thread-on type devices that restrict flow. Arrow-Breaker Hose Bibs are ASSE 1011 Approved, NSF/ANSI 372 certified Lead-Free, and UPC certified.