Tier1 SDC-45-2010 10 Micron 20 x 4.5 Hydronix Comparable Whole House Sediment Replacement Water Filter 6 Pack HIGH QUALITY MATERIALS: Spun Wound Polypropylene pre-filters dirt, sand, and other contaminants as small as 10 micron REPLACEMENT FIT: Fits standard filter housings using 20 x 4.5-inch filters LONG LASTING FILTRATION: Filter needs replacement every 3 months 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Dirt Sand Sediment Silt SDC-45-2010 TIER1-P10-20BB HFPP-1-PR20 W20FFPH1CBPR BBFS-22 Sediment in drinking water on its own isnt particularly hearmful to humans or pets but it can be an indication of lead or iron contamination which can cause serious health issues. If you suspect there is lead in your pipes get your water tested. Sediment filters help protect other appliances and posessions from the harmful effets of particles which can cause staining and spots on clothes, sinks, toilets and more and wear and deterioration on pipes and appliances If other filtration mediums are already in place in your home, sediment filters as a first layer of defense can increase the lifetime of your other filters by reducing the number of particles and contaminants that would otherwise wear on those other filters.