Tier1 EP-20BB 5 Micron 20 x 4.5 Carbon Block Pentek Comparable Replacement 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 Big Blue Carbon filter HIGH QUALITY FILTRATION: This filter reduces chlorine taste & odor, sediment, dirt, and particles. REPLACEMENT PART FOR MANY PART NUMBERS & MODELS: This filter is comparable to many 5 Micron 20 x 4.5 carbon block filter. Replace your old Pentek EP-20BB or Pentair EP-20BB with a Tier1 Big Blue Water Filter 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Bad Taste and Odor Chlorine Taste and Odor Sediment EP5-20BB EP520BB EP-5-20BB Turn off water supply. Press red pressure-relief button (if present). Unscrew housing. Remove large o-ring, wipe clean and set aside. Discard used filter cartridge. Wash housing with dish soap and warm water using a nonabrasive sponge or cloth. Rinse thoroughly. Fill 1/3 with water. Add about 1 tablespoon of bleach and scrub to disinfect. Rinse thoroughly. Lubricate o-ring with clean silicone grease. Change o-ring if any damage cuts or degradation are present. Insert o-ring in groove. Insert new filter cartridge. Screw housing onto the cap and hand-tighten. Do not over tighten. Make sure cap standpipe slips into cartridge. Turn on water supply. Press pressure-relief button (if present). Check for leaks before leaving installation. 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.