Pack of standard spiral pre-filters and 20-micron anti-sediment cartridges for 9 3/4 or 10-inch filter housings. These anti-fouling cartridges are designed for hot or cold water lines and are ideal for filtering out solid particles or fine organic matter. Benefits of the 9 3/4 Anti-Sediment 20 Micron Flush Pre-filter Cartridge Set: Economical pack, highly valued by customers, and durable. Strong and durable flush mesh ensures no fiber residue in the water. High resistance to high temperatures. Made in Italy and ACS certified. High-quality spiral polypropylene cartridges provide effective pre-filtration of organic contaminants, rust, or dust in water. Sediment Filter Spiral Cartridge 20 Micron for 9 3/4 and 10 Inch Filter Housings or Water Purifiers. Ideal for pre-filtration, placement before water softeners, or upstream of activated carbon filter cartridges for drinking water. Also suitable for treating rainwater for irrigation, sanitary facilities, or washing machines. For installation, use a simple filter housing or a double transparent filter housing with a 1 or 3/4 brass kit, compatible with standard 9 3/4 or 10-inch sizes, available in our store. ADDITIONAL INFORMATION: These spiral filter cartridges should be replaced at least once a year. Recommended for filtering or pre-filtering water upstream of an activated carbon or ultrafiltration cartridge (membrane). Consider placing a cartridge with a lower filtration limit (e.g., 1 micron) downstream for complete water purification and removal of any residual organic matter. Available for express delivery within 24 to 48 hours.