Manual Heater Hose Valve

Since I eliminated the AC on my car, I am thinking I would like to clean up under the hood by eliminating the extra vacuum valve that connects to the AC/heater box and the extra lengths of heater hose. I am actually going to keep the AC/heater box in the car since it will obviously mount under the dash without any problems. I was wondering if anyone has any pictures of a manual heater hose valve (if that is what you would call it) that is installed under the hood to be able to turn the flow of water on and off to the heater core so that I can still have heat when I want or need it? Any information would be greatly appreciated.