Harmsco's Up-flow 931 replacement filters are reusable and washable pleated polyester filters specifically designed to remove contaminants with high flow capability and low pressure drop. Pressure drops are exceptionally low due to the filters' high surface area. Advanced polyester-plus media can tolerate high temperatures up to 140°F and are engineered to deliver unparalleled durability and performance.
Low Pressure Drop with Harmsco Cartridges
Advanced Harmsco Cartridges
Pressure drops are exceptionally low with Harmsco filter cartridges due to high surface area and Polyester-Plus engineered media. The data shown to the left is per 9-3/4" cartridge in clean water.