Lead-Free Design is Suitable for All No-Lead Potable Water Installations in Full Compliance of All Lead-Free Plumbing Laws Quarter-Turn, Self-Cleaning Ball Valve Design Resists Mineral and Scale Build-Up, Assuring Positive Shutoff and Re-Opening The Ball-Seat Operation and Dual O-Ring Stem Seal Features, Out-Perform Traditional Multi-Turn Stop Designs An Ideal Upgrade Replacement for Worn, Leaking Stops that Won't Close Completely Lead-Free