Cartridge filter Cartridge filters T-SeriesT-series single cartridge filter: electropolished head, mechanically polished sump, opposite connections, bottom drain, NBR O-ring seal. Learn more Cartridge filters E-Series1 version: head and sump with NBR O-ring, drainable, optional wall mounting. 5-, 12-, 22-piece version: upright version with V-clamp closure. Learn more Cartridge filters K-SeriesAvailable in two diameters and three lengths, polypropylene head with opposing BSP connections for easy installation. Learn more Accessoires & Spare partsOriginal accessories and practical parts available for all cartridge filter housings. Learn more