Features: * new and high quality *For controlling the return temperature. RTL is a controller that maintains the desired temperature of the water in the underfloor heating system. Used to maintain temperature in mixed heating systems/underfloor heating systems/radiators. *RTL an automatic controller to control the temperature of the return water from the radiator or a floor heating circuit. Temperature of the water is transferred from the valve body to the sensor. If the temperature on the valve body is lower than water temperature, the controller closes, and if is higher opens the controller. Specifications: *Material: Plastic+brass *Color: whiteAs shown *SizeAs shown *Connection diameter:3/4inchDN20 *Connection head:M30x1,5 *Closing dimensions:11,5mm Setting temperature and regulating installation 1. Install the temperature control valve on the radiator inlet pipe through the connecting screw. 2. The temperature control valve shall be installed at the place where the room is in direct contact with the air. The temperature control valve shall not be placed in the heating hood. 3. Since the vertical installation of the temperature control valve will be affected, the thermostatic head must be installed horizontally to fully feel the heat energy of the surrounding environment and ensure normal operation. 4. When installing the sensor: adjust the housing scale to 5 and make the valve fully open. Put it on the valve body, align the position, and tighten the coupling cap in time. Set temperature and regulation 1. Turn the adjusting sleeve counterclockwise to 5 to fully open the valve. 2. Tighten the connecting copper sleeve clockwise. 3. Now you can rotate the adjusting jacket to set the required room temperature between * - 5. 4. It is recommended to set the scale when sleeping at night. 5. Build calibration when going out or ventilation. 6. Usually heating settings. 7. Very warm season setting. Package Contents: 1Pc*Thermostatic valve Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.for roof tiles, roof tiles, roof tiles