The Speakman SEF-TW Thermostatic Mixing Valve Eyewash Kit is a high-quality valve designed for use with water. Made of durable brass, this valve features a 9 GPM flow rate and comes with a gauge for easy monitoring. Its NPT port type ensures easy installation and reliable performance, making it a valuable addition to any plumbing system. With the trusted Speakman brand and its thermostatic mixing capabilities, this valve kit provides a reliable solution for controlling water flow in various industrial and commercial applications.