A professional who tends equipment that removes chemical salts from wine. Respnsibilities include:

• Starts pump and opens valves to circulate wine through column of synthetic resin crystals to absorb potassium ions from wine.
• Opens valve to admit water into column to backflush accumulated sediment.
• Opens valve and starts pump to circulate acid or brine solution through column to regenerate resin crystals.
• Notifies maintenance engineer of equipment malfunction.