AquaHouse Small UV Pre-filter Sediment Replacement Cartridge AH-SED105-UV Suitable for removing rust and sediment particles from the water prior to a small UV lamp, to help ensure proper functioning of the lamp and to help protect the quartz sleeve from fogging 5 Micron rated sediment filter. Replace filter as required - dependent upon usage and water quality AquaHouse replacement sediment filter code: AH-SED105-UV?? for AquaHouse Small UV pre-filter system (model AH-UVPRE?) AquaHouse branded filter, Aquahouse is a registered trademark of Water Filter Man Ltd