The universal fittings (a.k.a. "chicago" or "crowsfoot" fittings) quickly connect hoses and equipment for both air and water, and are rated for 150psi at ambient temperature. The interchangable fittings connect with a push and twist, and pins hold in them in place.
Threaded accessory fittings are also available to screw to your equipment which allow you to make the connection to the hose.