Seaward Thermostatic Mixer ValvePlumbing "safety fitting" for the Whale "Quick Connect" system. Thermostatic mixer valve using three 1/2" BSP Male threaded ports.Constructed of nickel-plated brass including non-return valve. Each BSP running thread is fittted with O-ring.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to >P65Warnings.ca.gov.