CONNECTION: 1/2-inch MIP (Male Iron Pipe) Connection*MATERIAL: This valve has an all brass body construction making it sturdy and durable*USE: This vacuum relief valve is used for automatic venting of closed systems to atmosphere when a vacuum is created*FEATURE: It consists of a black protective cap for extra protection*TESTED: This product is tested and rated to ANSI z21. 22 and complies with lead-free plumbing laws