Abstract: An apparatus and method for producing a slurry of dry metered plaster and metered water on a continuous basis. The apparatus consists of an element functioning to receive dry metered plaster and to agitate this plaster before discharging it downward from a discharge aperture. An additional device receives metered water and causes it to eject in such manner as to surround and encompass the discharging dry plaster in sheets or sprays of water. A receptacle element is disposed to receive the plaster and water and is so configured that the commingling mixture will descend along the side of the receptacle into an aperture at the base. Additionally a progressive cavity pump is disposed in juxtaposition and communicating with the receptacle aperture so that the commingling mixture will draw into the pump. Upon passing through the pump the mixture is transformed into a homogeneous slurry and is propelled through a conduit to the point of use.