The RS 22 SED5 filters sediment dirt and rust particulate down to 5 microns 5 Micron sediment filtration Removes Sediment Dirt amp Rust Cost Effective Fits 1240 Series E M amp Pro Systems HT101 HT102 HT103 and HT123 Series Systems Replace every 6 months or as needed Also known as Arrowhead Puritap 41400008 Hydrotech 41400008 Pentek 255822 43 Sierra Springs 41400008 US Pure Water Products 41400008 Clack Microline Additional Details ------------------------------ Product description: The RS 22 SED5 filters sediment dirt and rust particulate down to 5 microns 5 Micron sediment filtration Removes Sediment Dirt amp Rust Cost Effective Fits 1240 Series E M amp Pro Systems HT101 HT102 HT103 and HT123 Series Systems Replace every 6 months or as needed Also known as Arrowhead Puritap 41400008 Hydrotech 41400008 Pentek 255822 43 Sierra Springs 41400008 US Pure Water Products 41400008 Clack Microline