Tier1 Replacement for Pentek DGD-2501-20 1 Micron 20 x 4.5 Spun Wound Polypropylene 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 SDC-45-2001 HIGH QUALITY FILTRATION: The Tier1 DGD 2501 20 pleated sediment filter reduces sediment, dirt, particulates, sand, and silt REPLACEMENT PART FOR MANY PART NUMBERS & MODELS: This filter is comparable to many 1 Micron 20 x 4.5 sediment filter. Replace your old Pentek DGD-2501-20 or Hydronix SDC-45-2001 with a Tier1 DGD-2501-20 filter 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Coarse Sand Hard Scale Limescale Oxidized Iron Particles Sand DGD-2501-20 Pentek DGD-2501-20 155360-43S DC-45-2001 DGD-2501-20 SDF-45-2001 FPMB-BB1-20 TIER1-DGD1-20BB P1-20BB TIER1-P1-20BB 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.