Garden Hose Quick Disconnect, Model 20135 by Camco.  Features automatic shutoff.  That shuts water flow off automatically when disconnected..

Quick disconnects make connecting and disconnecting things on brew day easier.  I have QDs (a different brand) on every hose connection I use on brew day, including sprayers and my wort chiller.

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for current description, price and availability.  Also: Today’s Deals on Amazon

Camco 20135 Brass Quick Hose Connect

Also Consider: Camco 22853 Premium Drinking Water Hose