A professional who operates silica-filtering machine to remove protein and yeast particles from beer. Respnsibilities include:

• Positions filter screens between frames and lowers screens into filter tank, using power winch.
• Fills mixing tank with specified amounts of silica and water.
• Starts agitator that mixes water and silica, and starts pump to transfer mixture into filter tank and coat screens.
• Turns calibrated carbon dioxide air valve to pressurize tank.
• Starts pump that transfers beer from storage tank through filter screens to strain protein and yeast particles from beer.
• Drains off sample of beer and examines it for clarity.
• Starts pump to transfer filtered beer to bottle-house storage tank or to lager cellars for carbonation.
• Removes screens from tank, using power winch, and rinses screens with water, using hose.
• Records number of barrels and type of beer filtered on production records.