The Air Over Water Test Gauge is a versatile tool designed for testing and monitoring pressure systems. With a 1/4" NPT top mount and a 3/4" female hose connection, it allows for easy installation and connection to various applications. The 2" dial provides clear and precise readings, with an input range of 0-200 PSI, making it suitable for a wide range of pressure testing needs. This gauge is a reliable and durable choice for professionals in industries such as plumbing, HVAC, automotive, and more. Its sturdy construction ensures accurate and consistent performance, while the convenient top mount design allows for easy visibility and access during operation.