Top mount faucet valve body

A plumbing fixture adapted to be installed from the top side of a sink deck through a sink deck opening includes a valve body having an exterior threaded portion of a size to pass through the sink deck opening. There is a shoulder on the valve body which is adapted to seat upon the sink deck when the threaded portion extends through the sink deck opening. A threaded collar is mounted on the valve body threaded portion with the collar being of a size to pass through the sink deck opening. A collapsible sleeve is coaxial with the valve body and positioned thereon between the collar and the shoulder, the sleeve having an outer diameter, when collapsed, which will permit the sleeve to pass through the sink deck opening. Rotation the valve body from above the sink deck, after the threaded portion, collar and collapsible sleeve have been passed through the sink deck opening, causes the collar to move on the valve body toward the underside of the sink deck to axially compress and radially expand the collapsible sleeve until the valve body is secured to the sink deck between the valve body shoulder and radially expanded collapsible sleeve.