A two-part sillcock includes interior and exterior sillcock members selectively coupled to actuate a valve that controls fluid flow to a faucet. The interior sillcock member includes a flanged housing having an inlet, an outlet, and a valve with a stem including a coupling at the outlet end. The coupling is supported within the housing by an adapter adjacent the outlet end. The exterior sillcock member includes a flanged faucet including a handle shaft with a coupling at the inlet end. An adapter adjacent the housing outlet supports the valve stem coupling and guides and receives the faucet handle shaft coupling for engagement of the couplings. When the exterior and interior sillcock flanges are connected, the faucet handle shaft coupling is connected with the valve stem coupling, so that movement of the handle controls operation of the valve. A dual two-part sillcock includes two sillcocks connected by a mixing assembly.