Use with all our H/C Universal System 
Models 404 - 406 - 405 and 226
Uses Heater Hoses 
5/8 X 5/8 Heater Hose Connections
Cable operated heater control valve (cable not included) to open and close the flow of water. The valve is setup to pull to open. The valve is very common on cable operated aftermarket ac systems. The valve has 5/8″ heater hose ends. These valves can be used with the factory cables on the original control panels.
This heater control valve ensures the proper functioning of our Underdash A/C units.