Tier1 Replacement for Pentek ECP5-20BB 5 Micron 20 x 4.5 Pleated Cellulose Sediment Water Filter 4 Pack - Not for Well Water 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 ECP5-20BB water filter. HIGH QUALITY FILTRATION: This Pentek ECP5-20BB comparable Tier1 filter reduces sediment, dirt, rust, and particles. Note: Not Recommended for Well Water Systems. REPLACEMENT PART FOR MANY PART NUMBERS & MODELS: This filter is comparable to many 5 Micron 20 x 4.5 inch pleated polyester sediment filter. Replace your old Pentair ECP5-20BB with a Tier1 ECP5-20BB 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Dirt Particles Sediment 255494-43 255496-43 4PAY5 Pentek ECP5-20BB 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 <span class="a-text-bold">NOTE:</span> This step is important to ensure a proper housing seal. Make certain the o-ring is seated level in the 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.