Diamond-H WTS Dual Function Wired (not push fit) Rod ThermostatProduct Information Technical data 11" length preset temp: 80C Max Operating Trip, 90C Safety Trip double pole dual function This is a Dual Function Rod Stem Thermostat with adjustable trip and fixed safety cut out. Operational switching is achieved via single pole stem control and a manually re settable safety cut off is via a capillary system. Employing a capillary system for safety allows the benefit of sensing the water or fluid temperature within