TIer1 SDC-45-2010 20 Micron 10 x 4.5 Hydronix Comparable Whole House Spun Wound Sediment Replacement Water Filter 12 Pack REPLACEMENT FIT: Fits standard filter housings using 10 x 4.5-inch filters. 10 inches (length) x 4-1/2 inches (outside Diameter) QUALITY MATERIALS: Spun Wound Polypropylene HIGH QUALITY DESIGN: Designed to help ensure you serve only high quality water throughout your home. COMPARABLE REPLACEMENT: Cost effective alternative to Hydronix SDC-45-2010 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Particulates Sediment SDC-45-1020 P20-10BB FPMB-BB20-10 SDC-45-1020 FPMB-BB2010 SDF-45-1020 FPMBBB2010 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.