This Single Control Pressure Balance Mixing Valve with Screwdriver Stops is automatically balances incoming hot and cold water pressure to provide a consistent, comfortable temperature. With a flow rate strong enough to support up to two showerheads, it's the perfect choice when you want to take a basic shower to the next level. Solid brass construction Ceramic disc valve provides a tight seal for drip free performance and ensures durability over time Combination 1/2" copper sweat/IPS 4-port hook up Valve will perform at ASSE 1016 standards when flow rate is restricted to 2.0 GPM Back to back installation feature Mounting bracket & plaster guard included With temperature limit adjustment Codes/Standards UPC/cUPC listed ASME A112.18.1M/A112.18.1 Meets requirements of ASSE 1016 Key Features & Innovations cUPC Listed Product Technologies / Benefits: Ceramic Disc Valve: A valve controls the flow of water. It responds to the turn of a handle from on to off and off to on. Danze Ceramic Disc Valves are built using two ceramic disc plates that have been smoothed to perfection. This smooth finish creates a water tight seal between the two plates as they slide to and from the on/off position. Danze Ceramic Disc Valves are maintenance free and stand the test of time.