The PROFLO Descaler Pump Kit is designed to remove scale, lime, mineral deposits and rust from tankless water heaters. Regular descaling will improve heat transfer and efficiency. PROFLO PF91655 Features: Energy efficient 55 watt mag drive pump 3.5 Gallon pail with screw top lid for easy access & storage Two - 6 clear poly hoses allow debris to be seen while pumping Bucket filter grate to protect pump from larger debris