FA 20" SX Filter Cartridges - 25 micron INSTALLATION & USE Please note: If we do not have stock available to fulfill your order we may send an equivalent product of equal or better specifications.   Atlas Filtri FA Polypropylene Wound Thread Cartridge - for Sediment Filtration down to 25 MicronRE5117411- FA 20 SX 25 mcrTo fit all Atlas Filtri SX 20" Housings as well as most standard housings available on the market.- All SX sediment cartridges now have brand new grey flat gaskets with antimicrobial protection to fight the risk of microbial attack- Quick-fitting double o-ring cartridges ensure a perfect watertight fit , are simple for maintenance operations, eliminate wrong positioning, and are safer for micro-filtration.- FA filter cartridges are made with polypropylene thread wound on polypropylene or reinforced polypropylene inner core.- The wound thread cartridges are a heavy-duty sediment filter to remove scale, sand, lime, rust, and other fines for filtration and pre-f