The brass, bronze and stainless steel components of the new 7 series TempControl Lead Free valves allow for precise temperature control and meet Federal Lead Free requirements. The tamper-resistant hex bolt combined with the optional cabinets help prevent unwanted temperature adjustments. Several "Factory assembled and tested" options available. Symmons® Replacement Cartridge, Series: 7 Series, For Use With: TempControl® 3/4 in Inlet x 1 in Outlet Thermostatic Mixing Valve