The FS7-4WJ Flow Switch by McDonnell Miller is a high-performance device designed for 1-1/4 BSTP applications. This flow switch features a durable construction that ensures long-lasting reliability in various fluid management systems. With its precise flow detection capabilities, it is ideal for monitoring water and other liquids in both residential and commercial settings. The FS7-4WJ meets industry standards for safety and efficiency, making it a dependable choice for professionals seeking quality flow control solutions.