TOTOSolenoid Unit and Diaphragm Assembly TOTO THP3191R Solenoid Unit and Diaphragm Assembly This valve is a solenoid operated diaphragm assembly. The valve has a 5 inch port size. It is for commercial application in supply air and as an actuator for seat, flapper, and other similar valves. New in open box. 4244EO, B199
