Santec PB-3950 is a pressure-balanced tub and shower valve designed to provide a consistent water temperature regardless of changes in water pressure. It features a maximum operating pressure of 145 psi and a flow capacity of 5 USGPM at 50 psi. The valve is equipped with a temperature limit stop to prevent scalding and can be installed with either top-down or side-mounted handles. The PB-3950 is easy to install and maintain, with a simple design that makes it suitable for both residential and commercial applications.