[martincom]

You could accomplish the same thing with separate outdoor faucets and then a "Y" hose (originally for washing machines), which can be found at most hardware stores. I have a hot and cold hose spigot/valve on my workshop washtub, in addition to a tall kitchen sink spray wand faucet. I also have hot & cold spigots next to the hose reel in the beach house garage. I have a Y hose at each one.

You'll have no issue leaving the Y hose on in the winter, as long as you don't leave a hose connected to it and it can drain. The plus side of the Y hose is it will allow to utilize conventional frost free faucets, which are less money, or you can get them in longer lengths if you penetrating a thick wall, such as concrete block.