A professional who tends pumps that refill air and hydrogen purification filters with water and solutions to maintain operating levels. Respnsibilities include:

• Reads gauges to check levels of water, liquid nitrogen, and caustic solution in air and hydrogen purification filters.
• Starts pumps that refill purification filters with water or other solutions to maintain specified levels.
• Cleans and changes filters of air and hydrogen driers.
• Records pressure and temperature readings of compressors, filters, and driers.