Same Valve I installed over 15 years ago – works fine with a pull cable.  But, again if you do not have the means for shutting off the coolant flow in both hoses, a leak in your system will end up dripping into your cockpit.  OR you at least need  a check-valve in the out-flow line to keep coolant from coming back in that way.

 

OR am I missing something – everyone seems focused on only one valve?

 

Ed

 

 

I used something like this for controlling my heater water flow: