For some help building an outside dog wash, visit your local plumbing supply house. Alot of them sell to the public as well to wholesale customers. No offense to anyone in the big box industry (honest, I visit Lowe's and Home Depot too!) but there are a TON more options that the supply houses can offer. Your local supply houses will know what valves will work perfectly in the freezing conditions for your area.If you have a way to tie into a hot and cold line check out
http://www.moen.com/shared/pdf/hc400506sp.pdf This sill faucet allows you connect a garden hose (ahh, I see the light bulbs going off-yes, warm water to wash cars!!!).
Disclaimer:nah, I'm not a plumber, I just try to play with lots of goofy ones in real life.
