Just like Scott_S, I also need hot water to fill my jug, here is what I came up with. There is a lot going on in this photo but what I have here is a permanent courtesy hose for washing down my Silver Bullet filter, a permanent high pressure hose going to the back of my van, solidly mounted a female QD with Joe's inline temp gauge, (that way when I'm mixing up powdered presprays, I can monitor the mixing temps, another benefit...high pressure is really good for mixing). AND right where you see Joe's valve in that photo, that feeds one of my 2 chemical tanks. (you have to watch for overfilling though)
I use that green HP line going to the back to feed the "satellite" female QD. Int the back of my van I have another courtesy hose with a hydro force spray handle on a live swivel. Its awesome for mixing presprays and power washing tools between jobs before I load them up. I can take some more photos if you guys are interested.