A mechanical vacuum/or cable operated valve designed to thermostatically regulate the flow of water from the engine to the heater core.
NSN 4140-00-143-4772
NSN 5965-00-062-0559
NSN 5905-01-215-1143
NSN 5960-01-531-9108
NSN 6110-01-505-6074
NSN 6145-01-003-9741
NSN 5930-01-264-2796
NSN 5920-01-330-0486
NSN 4140-00-767-8166
NSN 5835-01-336-0462
NSN 6240-00-129-6653
NSN 2925-01-341-0457