Top 10 4.5 x 20 Water Filter – Replacement Under-Sink Water Filters

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1. iSpring

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ISpring FP25BX2 High Capacity 20” x 4.5” Water Replacement Cartridges Big Blue Fine Sediment Filters, 2 pieces / 5 microns, White, 2 Count

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iSpring #ad - Peace of mind customer service: register online to activate your manufacturer warranty and life-time free tech support from U. S. Unlike an ro membrane, the filters don’t reduce Total Dissolved Solids TDS, and instead keeps healthy minerals in your water. Top-notch quality: the fp25b high capacity polypropylene sediment filter is able to achieve filtration down to 5 microns.

Local support team. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. The filters are tested by an independent third-party to meet NSF/ANSI standards. We are happy to help! Please note: the cartridges are individually wrapped to ensure freshness. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis RO systems. Protect your family and household appliance from sediments: the fp25b sediment filters are specially designed to remove sediments, sand, dirt, silt, dust, large particles, and rust from water.

The 20” x 4. 5” filter cartridges have a minimum impact on water flow up to 15 GPM and require minimum maintenance. They are usually used as the first stage of a water filtration system to prevent the filters that follow from getting clogged too soon. They have a capacity of 100, 000 gallons of water, enough to supply a family of four with clean water for a full year depending on your water quality.
BrandiSpring #ad
ManufacturerPurenex #ad
Height6 Inches
Length20 Inches
Weight1 Pounds
Width10 Inches
Part NumberFP25BX2-FBA
ModelFP25BX2

2. Express Water

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KDF High Capacity Cartridge Filters – 5 Micron Water Filter 4.5” x 20” inch, Carbon Block, Express Water Whole House Heavy Metal Water Filter Set – 3 Stage Water Filtration Replacement Kit – Sediment

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Express Water #ad - Sediment filter: keep the most damaging sediments out of your water with Express Water’s 4-layer smart water filter design. Heavy metal water filter: protect your home from dangerous impurities with the advanced KDF heavy metal filter which combines catalytic carbon and high purity ionically charged copper and zinc granules to reduce Heavy Metals, Lead, Iron, Nickel, Chromium and more.

Take care of your home: protect our plants, laundry machine, give healthier water to your pets and extend the life of your dishwasher, and other appliances through proper and efficient 3-stage water filtration. Carbon water filter: efficient tight packed carbon granules give you the efficient high capacity filtration you need in your whole home water filtration system. Catch and remove the largest contaminants in the filter’s outer layers while inner layers catch the finer contaminants giving you the longest lasting and effective water filtration system for your home. Save time and money: high-capacity filters will efficiently and effectively filter your water without loss of pressure.

Please be informed - whole house systems are installed at the main water supply line for the purpose of treating all incoming water in your home or business. Trust express water: choose the best filters for home filtration and make your house a clean water house today! Whole house water filter system: reduce harmful impurities from your entire home’s water with Express Water’s 3 Stage Water Filtration System and easy to replace Water Filter Replacement Cartridges. Long lasting water filtration: the highest quality, long-lasting materials give you up to 100, 000 gallons of water filtration depending on incoming water quality.
BrandExpress Water #ad
Height20 Inches
Length4.5 Inches
Weight17.5 Pounds
Width4.5 Inches
Part NumberFLTWH2045CKS1
ModelFLTWH2045CKS1

3. iSpring

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Grey, iSpring FC25B High Capacity 20” x 4.5” Water Filter Replacement Cartridge Whole House Big Blue CTO Carbon Block, 4.5" x 20"

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iSpring #ad - Peace of mind customer service: register online to activate your manufacturer and life-time free tech support from U. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. Standard size: our filter set fits standard 20” x 4.

Please unwrap the cartridges before use. S. Protect your family and household appliance from chlorine and more: say goodbye to smelly, bad tasting water! The FC25B carbon block filter is specially designed to remove up to 99% of chlorine from water as well as various natural organic compounds, taste and odor compounds, and synthetic organic chemicals. Unlike an ro membrane, and instead keeps healthy minerals in your water. The 20” x 4. 5” housings, including brand name models. Activated carbon is an effective adsorbent because it is a highly porous material and provides a large surface area to which contaminants may adsorb.

If you are interested in a filter that removes TDS, the filters don’t reduce Total Dissolved Solids TDS, consider our iSpring Reverse Osmosis RO systems. 5” filter cartridges have a minimum impact on water flow up to 15 GPM and require minimum maintenance. Local support team. Top-notch quality: our fc25b cto carbon block filters are made of high-quality coconut shell activated carbon for maximum filtration efficiency and filter life.
BrandiSpring #ad
ManufactureriSpring #ad
Height20 Inches
Length4.5 Inches
Weight5.2 Pounds
Width4.5 Inches
Part NumberFC25B
ModelFC25B

4. Express Water

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Express Water – 10 Pack Sediment Replacement Filter – Whole House Replacement Water Filter – SED High Capacity Water Filter – 5 Micron Water Filter – 4.5” x 20” inch

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Express Water #ad - Long lasting water filtration: sediment replacement water filters have a life cycle of 100, 000 gallons or 6–12 months depending on incoming water quality, providing your home with reliable whole home water filtration. High quality whole home water filter: Express Water’s sediment replacement filter means no more worrying about your home’s water.

Express water sediment filter reduces dirt, rust, dust, sand, and other harmful sediments from your home water systemUniversal Standard Size Water Filters: Take the guessing out of replacing your water filters. Whole house water filter system: reduce harmful impurities from your entire home’s water with Express Water’s 3 Stage whole house water filtration system and easy to replace water filter replacement cartridges. Easy to replace water filter cartridges: All Express Water whole house water filter replacement cartridges are designed for quick and easy replacement to keep your system up and running. Sediment water filter: protect your home from sediment damage while improving the quality and taste of your water.

With specially engineered high flow filtration you can have crisp clean drinking water from any faucet with no drop in your water pressure. On demand support: support from experts who can answer any of your questions about your Express Water whole home water filter system. Reliable water filtration: help your business prevent costly build up of rust and other damaging sediments, give healthier water to your pets, extend the life of your home appliances, and more with Express Water’s whole home filtration systems. Express water replacement Filters: Express Water has all your whole house filtration needs covered.
BrandExpress Water #ad
ManufacturerExpress Water #ad
Height4.5 Inches
Length20 Inches
Width4.5 Inches
Part NumberFLTWH2045S10
ModelFLTWH2045S10

5. iSpring

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CTO Carbon Block, iSpring F3WGB32BM 4.5” x 20” 3-Stage Whole House Water Filter Set Replacement Pack with Sediment, and Iron & Manganese Reducing Cartridges Fits WGB32BM

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iSpring #ad - Unlike an ro membrane, the filters don’t reduce Total Dissolved Solids TDS, and instead keeps healthy minerals in your water. Peace of mind customer service register online to activate your manufacturer and life-time free tech support from U.

Both are tested by an independent third-party to meet NSF/ANSI standards. It lasts up to 3 times longer than greensand due to the catalytic media not being consumed in the process. The filter set also removes sediment, herbicides, rust, Manganese, VOCs, and various other contaminants.55” filter cartridges have a minimum impact on water flow up to 15 GPM and require minimum maintenance. 01 ppm. Diy installation and maintenance refer to our manual and our helpful youtube videos for easy diy installation.

The 20” x 4. For well/pond water with very high iron/manganese please contact us for customized solutions. S. Please unwrap the cartridges before use. Top-notch quality the first stage high capacity polypropylene sediment filter is able to achieve filtration down to 5 micron. The second stage cto carbon Block filter is made of high-quality coconut shell carbon for maximum filtration efficiency and filter life.
BrandiSpring #ad
ManufactureriSpring Water Systems #ad
Height4.5 Inches
Length20 Inches
Weight14.65 Pounds
Width10 Inches
Part NumberF3WGB32BM
ModelF3WGB32BM
Warranty30 days

6. Aquaboon

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Aquaboon Big Blue Coconut Shell Water Filter Cartridge | Activated Carbon Block CTO | Universal Whole House 5 Micron 20 inch Cartridge | Compatible with EPM-20BB, 155783-43, FC25B 2-PACK, CB-BB-20

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Aquaboon #ad - Universal 20-inch replacement elegantly designed at 4. 5” x 20”, ispring, omni, kenmore, pelican, ge, watts, trojan, filtrete, dupont, hydronix, culligan, omnifilter, it will fit all standard 20 inch Big Blue Whole House filtration systems of 3M, Whirlpool, Pentek, ClearChoice, etc.

Compatible replacement filters clearchoice 84642, pelican cb-bb-20, hydronix cb-45-2005, trojan cb-bb-20, EPM-20BB, CB-45-2010, ispring fc25b, pentek 155783-43, Watts WCBCFF20, cbc-20bb, 84641, etc. Enjoy long-lasting coconut shell activated carbon water filters. Aquaboon – your smartest coconut shell water filter solution! Lifetime - 6 month Replace once or twice times a year, depending on the water quality. Long lasting your carbon block activated water filter comes in an airtight packaging, so you can trust it won’t go to waste, works better and lasts longer.

Ultra-high grade filtration our pure water coconut carbon filter is extensively tested and verified to meet health and product standards. Your easy and smart coconut shell carbon filter. Completely clean water make your home contamination-free by removing chlorine and other harmful industrial chemicals - Now you can drink water knowing it is 100% safe. Have a piece of mind knowing your water is purified with the superior Aquaboon filtration system.
BrandAquaboon #ad
ManufacturerAquaboon #ad

7. Aquaboon

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SDC-45-2005, P5-20BB, 2 Pack, 155358-43, FP25B, Aquaboon 1 Micron 20" Big Blue Sediment Water Filter Replacement Cartridge | Whole House Sediment Filtration | Compatible with AP810-2, FPMB-BB5-20

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Aquaboon #ad - Replace for great taste of your water. 5 zones of filtration to ensure quality and remove more contaminants, dirt, agents, and rust particles. Universal replacement - fits most 20 inch Big Blue Water Filter housings. Compatible replacement filters aqua sun international sws-bb, filter specialist cmmf0520-45w1, watts fpmb-bb5-20, sdg-45-2005, pentek 155358-43, ispring fp25b, liquatec sdf-45-2005, everpure ev910837, pura 33003117, sterilight cmb-520-hf, freshwatersystems mbgc-45200-05, clearchoice 84644, Hydronix SDC-45-2005, EV910837, Pentair DEV910837, AquaPure AP810-2, Neo-Pure MBGC-45200-05, p5-20bb, axeon membranes 200640, Valuetrex VX05-20BB, P5-20BB, Heritage Parts TMP5618907, etc.

Contains no binders, such as sand, solvents, silt, large and fine particles from a drinking water, antistatic materials or wetting agents.

Compatible housings 3m 70020143163, ap802-1. 5, aquapure ap802, ge, cuno 5557610, geekpure, us aqua, olympia, smart aqua life, cfs02t. Lifetime 4 - 6 months / 20000 - 30000 gallons depending on the water quality. Systems from 3m, dupont, pentek, global water, whirlpool, Glacier Bay, Culligan, Costway, the Perfect Water, APEC, Aqua-Pure, Aquasana, etc. Dimensions 20 inches x 4. 5 inches - 2-pack of 1 micron Sediment Water Filter. Quality filtration made of thermally bonded 100% pure polypropylene microfibers.
BrandAquaboon #ad
ManufacturerAquaboon #ad
Height20 Inches
Weight5 Pounds

8. Aquaboon

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AP810-2, SPC-45-1005, Aquaboon 5 Micron 20" Big Blue Pleated Sediment Water Filter Replacement Cartridge | Whole House Sediment Filtration | Compatible with ECP5-BB, 2-Pack, CP5-BB, ECP1-20BB, HDC3001

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Aquaboon #ad - Replace for great taste of your water. Dimensions 20 inches x 4. 5 inches - 2-pack of 5 micron big blue pleated Sediment Water Filter. Quality filtration made of 100% pure polypropylene microfibers. Pleated cartridge provides “depth” filtration and remove more contaminants, large and fine particles from a drinking water, agents, and rust particles.

Whole house sediment filtration. This cartridge is pleated, it provides increased surface area and longer filter life. Fits most 20 inch Big Blue Whole House systems. Lifetime 4 - 6 months / 20000 - 30000 gallons depending on the water quality. Compatible filters and housings liquatec spf-45-1005, spf-45-2005, 255493-43, pbb-p20-1, ecp5-bb, ps-45200-01, ecp5-20bb, 255494-43, wpc1ff20, pbb-p20-5, pelican pbbb-p20-5, ps-45200-05, neo-pure ps-45097-05, watts fm-bb-20-5, pwpl20bbm5, ecp1-20bb, purwater pc05-bb-s, shurflo 15-054-02, pentek 255490-43, etc. Compatible replacement filters ace hardware 4021341, cp5-bb, ps-45200-01, 84646, hb-20-5w, 84647, dupont hdc3001, wb-hb-20-1w, ametek cp5-bb, harmsco hb-20-1w, aquapure ap810-2, american plumber 155184-51, rs-15, freshwatersystems ps-45200-05, omnifilter RS15, w5cphd, CP5-BBS, clearchoice 84634, hydronix spc-45-1005, cuno cfs210-2, culligan 155184, wb-hb-20-5w, freshwatersystems ps-45097-05, cp5-bbsa, SPC-45-2001, spc-45-2005, flowmax fm-bb-20-1, Keystone GPC5.

Contains no binders, solvents, dirt, silt, such as sand, antistatic materials or wetting agents. Universal replacement - fits most 20 inch Big Blue Water Filter housings.
BrandAquaboon #ad
ManufacturerAquaboon #ad
Height4.8 Inches
Length20 Inches
Weight3 Pounds
Width8.82 Inches
Part Numberunknown

9. Aquaboon

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P5-20BB, FP25B, FPMB-BB5-20, SDC-45-2005, 2 Pack, 155358-43, Aquaboon 5 Micron 20" Big Blue Sediment Water Filter Replacement Cartridge | Whole House Sediment Filtration | Compatible with AP810-2

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Aquaboon #ad - Contains no binders, large and fine particles from a drinking water, antistatic materials or wetting agents. Dimensions 20 inches x 4. 5 inches - 2-pack of 5 micron Sediment Water Filter. Compatible housings 3m 70020143163, ge, global water, glacier bay, geekpure, culligan, whirlpool, us aqua, olympia, apec, the perfect water, cfs02t.

Universal replacement - fits most 20 inch Big Blue Water Filter housings. Lifetime 4 - 6 months / 20000 - 30000 gallons depending on the water quality. Compatible replacement filters aqua sun international sws-bb, heritage parts tmp5618907, neo-pure mbgc-45200-05, freshwatersystems mbgc-45200-05, pentair dev910837, ispring fp25b, axeon membranes 200640, watts fpmb-bb5-20, pura 33003117, sdg-45-2005, clearchoice 84644, p5-20bb, aquapure ap810-2, p5-20BB, Filter Specialist CMMF0520-45W1, Everpure EV910837, ev910837, Valuetrex VX05-20BB, sterilight cmb-520-hf, Pentek 155358-43, Liquatec SDF-45-2005, hydronix sdc-45-2005, etc.

Quality filtration made of thermally bonded 100% pure polypropylene microfibers. Systems from 3m, costway, dupont, Cuno 5557610, AP802-1.5, aquasana, pentek, smart aqua Life, Aqua-Pure, AquaPure AP802, etc. Replace for great taste of your water. Whole house sediment filtration. 5 zones of filtration to ensure quality and remove more contaminants, silt, solvents, such as sand, agents, dirt, and rust particles.
BrandAquaboon #ad
ManufacturerAquaboon #ad
Height20 Inches
Weight5 Pounds
Part Number43235-7957

10. Tier1

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Spun Wound Polypropylene Water Filter, 4 Pack, Tier1 Replacement for Hydronix DGD-5005-20 and SDC-45-2005, 20x4.5, 5 Micron, Reduces Sediment, Dirt and Particles

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Tier1 #ad - High quality filtration: this tier1 155358-43 spun-polypropylene sediment filter reduces sediment, sand, particulates, dirt, and silt. Replacement part for many part numbers & models: this filter is comparable to many 5 Micron 20 x 4.

5 sediment filter. Quick & easy installation: quick and easy installation into your 20 x 4. 5 inch big Blue whole house filtration system. Replace your old dgd-5005-20 or liquatec sdf-45-2005 with a Tier1 SDF-45-2005. 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-45-2005. Enhanced water quality: Improves the quality of your water through contaminant reduction.
BrandTier1 #ad
Height8.18 Inches
Length20.12 Inches
Weight7.72 Pounds
Width8.58 Inches
Part NumberP5_20BB