ANGLE STOP ADAPTER VALVE: Angle stop adapter valves are designed for the connection of plastic or copper pipe COMPATIBILITY: This adapter valve is compatible with copper, PEX, and CPVC pipes DURABLE: This plastic fitting is made with durable plastics that are lead-free and protect against corrosion EASY TO INSTALL: This shut-off valve is quick to install and has a twist & lock feature for additional security SAFETY: This plumbing fitting is UPC-approved for potable water applications