The Apollo 34BLF Series Thermostatic Mixing Valves are designed to control and limit the volumes of cold and hot water required to deliver mixed water at a predetermined temperature either from the point of source or point of use application for single or multiple fixtures. The valves are built using lead free* materials and can be configured with several design features depending on your application. Now triple listed to ASSE 1017, 1069, and 1070 and a minimum flow rate of 0.5gpm. Lead free construction. Superior thermostatic element technology for optimum reliability, dependability, and accuracy. Integral strainers and check valves provide protection against crossflow and foreign particles. Thermostat over-temperature protection. Tamper resistant maximum temperature setting adjustment. Instantaneous cold or hot water supply failure shut-off protections. Made in USA.