The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Photo of original heater control valve install?

Davidf · 11-23-2015, 01:50 PM

maybe say it this way: water in/out direction does not matter. Some valves are normally open and some normally closed. I believe my '71 is normally open.

11-23-2015, 01:50 PM	#23
Davidf Registered User Join Date: Nov 2014 Location: Austin Posts: 749	Re: Photo of original heater control valve install? maybe say it this way: water in/out direction does not matter. Some valves are normally open and some normally closed. I believe my '71 is normally open.