Pentek R30-20BB 30 Micron 20 x 4.5 Comparable Whole House Sediment Water Filter QUICK & EASY INSTALLATION: Quick and easy installation into your 20 x 4.5 Inch Big Blue whole house filtration system 6 MONTH FILTER LIFE: By replacing your water filter every 6 months , depending on the quality of your water, you keep your water tasting great with the Tier1 R30-20BB Water Filter HIGH QUALITY FILTRATION: This Pentair R30-20BB Comparable Tier1 filter reduces sediment, dirt, rust, and particles REPLACEMENT PART FOR MANY PART NUMBERS & MODELS: This filter is comparable to many 30 Micron 20 x 4.5 inch pleated polyester sediment filter. Replace your old Pentek R30-20BB Pleated Polyester filter with a Tier1 R30-20BB 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Dirt Sand Sediment PENTEK-R30-20BB 155430-88 EF30-20FPVXDVP AMERICAN PLUMBER R3020BB TIER1-R30-20BB 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.