Top 9 Big Blue Water Filters 20 x 4.5 – Replacement Under-Sink Water Filters

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1. iSpring

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

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iSpring #ad - We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help! Please note: the cartridges are individually wrapped to ensure freshness. 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.

The filters are tested by an independent third-party to meet NSF/ANSI standards. Local support team. They are usually used as the first stage of a water filtration system to prevent the filters that follow from getting clogged too soon. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis RO systems. Standard size: our filter fits standard 20” x 4.

5” housings, including brand name models. Top-notch quality: the fp25b high capacity polypropylene sediment filter is able to achieve filtration down to 5 microns. 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 warranty and life-time free tech support from U. S. The 20” x 4.
BrandiSpring #ad
ManufacturerPurenex #ad
Height6 Inches
Length20 Inches
Weight1 Pounds
Width10 Inches
Part NumberFP25BX2-FBA
ModelFP25BX2

2. Express Water

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Express Water – 2 Pack Big Blue Water Filter Activated Carbon Block Replacement Filter – ACB Large Capacity Water Filter – Whole House Filtration – 5 Micron Water Filter – 4.5” x 20” inch

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Express Water #ad - On demand support: support from experts who can answer any of your questions about your Express Water water filter system. The highest quality, long-lasting materials give you up to 100, 000 gallons of water filtration. Coconut carbon provides an added layer of filtration with the freshest taste.

Express water’s 5 micron big blue Activated Carbon Block ACB Filter 2 Pack, 4. 5” x 20” size fits all standard 4. 5” x 20” whole home water filter system housings. Carbon water filter: efficient tight packed carbon granules give you the efficient high capacity filtration you need in your whole home water filtration system. 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.

Whole house water filter system: eliminate harmful contaminants from your entire home’s water with Express Water’s Water Filtration System and easy to replace Water Filter Replacement Cartridges. Universal standard size water filters: take the guessing out of replacing your water filters.
BrandExpress Water #ad
ManufacturerExpress Water #ad
Height4.5 Inches
Length20 Inches
Weight10 Pounds
Width4.5 Inches
Part NumberFLTWH2045C02
ModelFLTWH2045C02

3. Aquaboon

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

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Aquaboon #ad - 5 zones of filtration to ensure quality and remove more contaminants, large and fine particles from a drinking water, agents, silt, solvents, dirt, and rust particles. Dimensions 20 inches x 4. 5 inches - 2-pack of 1 micron Sediment Water Filter. Replace for great taste of your water.

Lifetime 4 - 6 months / 20000 - 30000 gallons depending on the water quality. Whole house sediment filtration. Compatible housings 3m 70020143163, aquasana, the perfect water, costway, us aqua, dupont, aquapure ap802, whirlpool, geekpure, ap802-1.5, aqua-pure, olympia, glacier bay, apEC, cuno 5557610, CFS02T. Quality filtration made of thermally bonded 100% pure polypropylene microfibers. Systems from 3m, ge, smart aqua Life, Global Water, Culligan, Pentek, etc. Universal replacement - fits most 20 inch Big Blue Water Filter housings. Compatible replacement filters aqua sun international sws-bb, sdg-45-2005, pentek 155358-43, filter specialist cmmf0520-45w1, hydronix sdc-45-2005, sterilight cmb-520-hf, p5-20bb, neo-pure mbgc-45200-05, clearchoice 84644, p5-20bb, ev910837, valuetrex vx05-20BB, Liquatec SDF-45-2005, pura 33003117, ispring fp25b, pentair dev910837, aquapure ap810-2, FreshWaterSystems MBGC-45200-05, everpure ev910837, watts fpmb-bb5-20, axeon membranes 200640, heritage parts tmp5618907, etc.

Contains no binders, such as sand, antistatic materials or wetting agents.
BrandAquaboon #ad
ManufacturerAquaboon #ad
Height20 Inches
Weight5 Pounds

4. Aquaboon

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ECP1-20BB, CP5-BB, SPC-45-1005, Aquaboon 1 Micron 20" Big Blue Pleated Sediment Water Filter Replacement Cartridge | Whole House Sediment Filtration | Compatible with ECP5-BB, AP810-2, HDC3001, 2-Pack

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Aquaboon #ad - Lifetime 4 - 6 months / 20000 - 30000 gallons depending on the water quality. Fits most 20 inch Big Blue Whole House systems. Replace for great taste of your water. Whole house sediment filtration. Dimensions 20 inches x 4. 5 inches - 2-pack of 1 micron big blue pleated Sediment Water Filter. Contains no binders, agents, solvents, it provides increased surface area and longer filter life.

Universal replacement - fits most 20 inch Big Blue Water Filter housings. Compatible replacement filters ace hardware 4021341, wb-hb-20-5w, dupont hdc3001, 84647, harmsco hb-20-1w, rs-15, flowmax fm-bb-20-1, cp5-bbsa, cp5-bb, w5cphd, hb-20-5w, 84646, ps-45200-01, wb-hb-20-1w, cp5-bbs, spc-45-2001, american plumber 155184-51, Hydronix SPC-45-1005, cuno cfs210-2, clearchoice 84634, aquapure ap810-2, culligan 155184, SPC-45-2005, ametek cp5-bb, freshwatersystems ps-45200-05, freshwatersystems ps-45097-05, omnifilter rs15, Keystone GPC5.

Pleated cartridge provides “depth” filtration and remove more contaminants, antistatic materials or wetting agents. Quality filtration made of 100% pure polypropylene microfibers. Compatible filters and housings liquatec spf-45-1005, watts fm-bb-20-5, spf-45-2005, pbb-p20-1, shurflo 15-054-02, pelican pbbb-p20-5, 255494-43, neo-pure ps-45097-05, pbb-p20-5, pentek 255490-43, PWPL20BBM5, 255493-43, ps-45200-01, ecp1-20bb, ps-45200-05, ecp5-20bb, ECP5-BB, purwater pc05-bb-s, wpc1ff20, etc. This cartridge is pleated, dirt, large and fine particles from a drinking water, such as sand, silt, and rust particles.
BrandAquaboon #ad
ManufacturerAquaboon #ad
Height4.69 Inches
Length20 Inches
Weight3 Pounds
Width8.82 Inches
Part Numberunknown

5. iSpring

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

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iSpring #ad - Activated carbon is an effective adsorbent because it is a highly porous material and provides a large surface area to which contaminants may adsorb. 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.

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. The 20” x 4. Unlike an ro membrane, and instead keeps healthy minerals in your water. Please unwrap the cartridges before use. They are tested by an independent third-party to meet NSF/ANSI standards. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. Local support team.

5” housings, including brand name models. 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. Peace of mind customer service: register online to activate your manufacturer and life-time free tech support from U. Standard size: our filter set fits standard 20” x 4.
BrandiSpring #ad
ManufactureriSpring #ad
Height20 Inches
Length4.5 Inches
Weight5.2 Pounds
Width4.5 Inches
Part NumberFC25B
ModelFC25B

6. Aquaboon

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

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

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. Aquaboon – your smartest coconut shell water filter solution! Lifetime - 6 month Replace once or twice times a year, so you can trust it won’t go to waste, depending on the water quality. Compatible replacement filters clearchoice 84642, cbc-20bb, cb-45-2010, pentek 155783-43, watts wcbcff20, iSpring FC25B, epm-20BB, 84641, pelican cb-bb-20, Trojan CB-BB-20, hydronix cb-45-2005, etc.

Ultra-high grade filtration our pure water coconut carbon filter is extensively tested and verified to meet health and product standards. Long lasting your carbon block activated water filter comes in an airtight packaging, works better and lasts longer. Have a piece of mind knowing your water is purified with the superior Aquaboon filtration system. Enjoy long-lasting coconut shell activated carbon water filters.
BrandAquaboon #ad
ManufacturerAquaboon #ad

7. SimPure

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Universal 20-inch Inline Sediment Filter Big Blue Housing 4.5" x 20", Wrench, Heavy Duty Steel Mounting Bracket, SimPure Upgrade Whole House Water Filter Housing, 4 Screws, 1-inch NPT Inlet Outlet

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SimPure #ad - Excellent customer service - we provide one year warranty and 30 days money back, lifetime tech support available, if you have any questions, do not hesitate to contact us, we will do our best to solve your problem. Premium quality - the heavy-duty whole house water filter housing is made of reinforced polypropylene for strength and chemical resistance.

Large capacity - the big blue filter housing has a 1" npt water inlet and outlet to ensure high water flow. Per your water quality, you can choose the sediment filter, carbon water filter, filtering a large capacity of water, GAC water filter for the DIY installation of the whole housing water filter system, and providing sufficient purified water for your whole family. Compared to other inline water filter housing without reinforced structure design, no water leaks from the mounting hole after long-term use.

Built-in pressure relief red button for water pressure release, heavy-duty steel mounting bracket, including a wrench, which makes it is easier for filter replacement. Compatibility - suitable for universal filter element 20" x 4. 5” standard whole house water filtration system set, Geekpure, iSpring, like Whirlpool, Pentek, Hydronix, Ronaqua, fits all 4.5 “ x 20 ” filters cartridges sold separately, etc. Easy installation - the big blue filter housing comes with all tools required for installation, 4 screws.
BrandSimPure #ad
ManufacturerSimPure #ad
ModelDB20

8. Express Water

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Charcoal, Express Water FLTWH2045CGS1 Whole House Set – 3 Stage Filtration Replacement Kit –, 5 Micron Water Filter – 4.5” x 20” inch, Carbon High Capacity Cartridge, – Sediment

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Express Water #ad - Carbon water filter: efficient tight packed carbon granules give you the efficient high capacity filtration you need in your whole home water filtration system. Laboratory vacuum heated organic coconut carbon provides an added layer of filtration with the freshest taste.

Standard water filter: drink the healthiest water on Earth as your home water filter reduces over 52 different contaminants from your water including chlorine, rust, pesticides, and more. The highest quality, long-lasting materials give you up to 100, 000 gallons of water filtration. Sediment filter: keep the most damaging sediments out of your water with Express Water’s 4-layer smart water filter design. Whole house water filter system: reducee harmful contaminants from your entire home’s water with Express Water’s 3 Stage Water Filtration System and easy to replace Water Filter Replacement Cartridges.

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. 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.
BrandExpress Water #ad
ManufacturerExpress Water #ad
Height4.5 Inches
Length20 Inches
Weight14.5 Pounds
Width4.5 Inches
Part NumberFLTWH2045CGS1
ModelFLTWH2045CGS1

9. Ronaqua

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Big Blue Sediment Replacement Water Filters 5 Micron 4.5”x 20" Cartridges WELL-MATCHED with 155358-43, FP25B, 2PP20BB1M, AP810-2, FPMB-BB5-20, SDC-45-2005 10 Pack, 20", P5-20BB

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Ronaqua #ad - This filter is wrapped and sealed and meets nsf national Science Foundation Standards and Regulations. Big blue 20-inch 5 micron sediment Water Filter - Used for effectively removing most sediments from water. Product lifetime - 20, 000 gallons - replace two or three times a year - depending on your water quality.

Well-fit following housings: pentek bbfs-222, water filters depot wfd h-20bb-1pr, premier water systems wf45-20-1npt, ispring hb28bx2 and wgb12b, hydronix hx-hf45-20blbk10, aquaboon ab-wh20bb, simpure rswhb002z_s8, H2O Splash WHBB20T1BL, geekpure bb-20b, h-h201bbe, 150235 and 150233, HFPP-1-PR20, Max Water B078FPN68M. This is a filter for pre-filtration of water and fits all 20 inch big blue water filter housings and well-matched models of cartridges: hydronix 2pp20bb1m, freshwatersystems mbgc-45200-05, ev910837, ispring fp25b, everpure ev910837, filter Specialist CMMF0520-45W1, Hydronix SDC-45-2005, Neo-Pure MBGC-45200-05,, p5-20bb, Watts FPMB-BB5-20, pentek 155358-43, Heritage Parts TMP5618907, CMB-520-HF, Liquatec SDF-45-2005, aquapure ap810-2, pentair dev910837, Valuetrex VX05-20BB.

Dimensions: 20 inches x 4. 5 inches 508 cm x 11. 43 cm.
BrandRonaqua #ad
ManufacturerRonaqua #ad
Height20 Inches
Length20 Inches
Weight20 Pounds
Width10 Inches
Part Number10S-20BB5
Model10S-20BB5