The Black Diamond Tank Drain Valve is a genuine replacement part designed to help maintain reliable air compressor performance by replacing a worn or leaking drain valve. Featuring a 1/4 in. NPT connection and a convenient quarter turn style design, this valve creates a snug, secure fit to prevent unwanted air and water leakage when the compressor is not being drained. Made with quality construction and materials, it is built for dependable operation. Regularly draining the compressor with a properly functioning drain valve helps ensure optimal performance and prolongs the life of your system.