# Frigidaire WF3CB PureSource3 Filter: What Fits, Which Cross-Fits Are NSF Listed, and Why the EPTWFU01 Is Not the Same Cartridge > Frigidaire WF3CB is the PureSource3 cartridge. Its NSF-listed cross-fits are rated 300 gal at 0.5 gpm to NSF/ANSI 42; the EPTWFU01 is a different 200 gal element. | | | |---|---| | Source | https://ownerspec.com/water/parts/frigidaire-wf3cb-puresource3-refrigerator-filter/ | | Publisher | OwnerSpec (https://ownerspec.com/) | | Published | 2026-09-15 | | Updated | 2026-09-15 | | Facts verified | 2026-09-15 | | Disclosure | Contains affiliate links. OwnerSpec may earn a commission at no cost to the reader. | --- ## Short answer The Frigidaire WF3CB is the PureSource3 refrigerator cartridge, and the spec that must match is the part number printed on the old cartridge, not the refrigerator brand. Frigidaire's own spec page did not respond when this page was researched, so no maker-stated capacity, months interval or compatible-models list is printed here. The cross-fits sold under the WF3CB trade name (Waterdrop, AquaCrest, Maxblue and others, 27 certified models built on element EFF-6040S) are listed in the NSF DWTU database to NSF/ANSI 42 at 300 gallons and 0.5 gpm, for chlorine taste and odor reduction only. The EPTWFU01, which some listings call the WF3CB upgrade, is certified on a different element, EFF-6047S, at 200 gallons and 0.5 gpm to NSF/ANSI 42, 53 and 401. Different element, different capacity: count the two as separate cartridges until Frigidaire says otherwise. If the old cartridge reads ULTRAWF, that is a third housing again. ## Fact sheet - **Answer:** The Frigidaire WF3CB is the PureSource3 refrigerator cartridge. Cross-fits certified under the WF3CB trade name in the NSF DWTU database share element EFF-6040S and are listed to NSF/ANSI 42 at 300 gallons and 0.5 gpm for chlorine taste and odor reduction. EPTWFU01-fit cartridges sit on a different element, EFF-6047S, at 200 gallons, so the two are not the same part, and Frigidaire's unreachable spec page is the only source for a maker interval. - **Applies to:** WF3CB; Number printed on the old cartridge: WF3CB, EPTWFU01 or ULTRAWF - **Compatibility basis:** NSF DWTU official listings for the trade names WF3CB (element EFF-6040S) and EPTWFU01 (element EFF-6047S); Frigidaire's own WF3CB page did not respond this session - **Assumptions:** No NSF DWTU listing exists under the company name Frigidaire, so no genuine-part certification is confirmed here; any such claim is the maker's own.; Cross-fit compatibility with the PureSource3 housing is inferred from the NSF trade-name pairing on each listing, not from a Frigidaire model list.; The certified capacity is a gallons figure only; the NSF listings publish no months interval and no micron rating. - **Method:** Capacity, flow rate, standard, element number and reduction claim read row by row from the NSF DWTU listings for the WF3CB and EPTWFU01 trade names. Every figure is a published listing; nothing was tested. - **Primary source:** [NSF, DWTU official listing for trade name WF3CB (element EFF-6040S, NSF/ANSI 42, 300 gallons at 0.5 gpm, chlorine taste and odor reduction)](https://info.nsf.org/Certified/DWTU/listings.asp?TradeName=WF3CB) (standards or certification body) - **Facts verified:** 2026-09-15 - **Last updated:** 2026-09-15 - **Canonical URL (cite this):** https://ownerspec.com/water/parts/frigidaire-wf3cb-puresource3-refrigerator-filter/ If the number on your old cartridge is ULTRAWF rather than WF3CB, leave now: the [Frigidaire ULTRAWF page](/water/parts/frigidaire-ultrawf-puresource-ultra-refrigerator-filter/) carries that housing and its cross-fits, and nothing below fits it. ## Which cartridge fits a PureSource3 refrigerator? The Frigidaire WF3CB is the genuine part, listed as a single cartridge. Frigidaire's WF3CB page timed out on every attempt this session, so its capacity, interval and model list are not printed here rather than copied from a reseller. The certified figures on this page belong to the cross-fits. The NSF DWTU listing for the WF3CB trade name shows 27 certified models, every one on element EFF-6040S, at a service capacity of 300 gallons and a flow rate of 0.5 gpm under NSF/ANSI 42. | Part | Certified element | Capacity | Flow | Standard | Claim | |---|---|---|---|---|---| | Frigidaire WF3CB genuine | Not published (no NSF listing under the Frigidaire company name) | Not published | Not published | Maker's own claim | Maker's own claim | | WF3CB cross-fits (Waterdrop, AquaCrest, Maxblue, Overbest, Umi) | EFF-6040S per NSF DWTU | 300 gallons per NSF DWTU | 0.5 gpm per NSF DWTU | NSF/ANSI 42 | Chlorine reduction, taste and odor | No Waterdrop, AquaCrest or ICEPURE listing for the WF3CB trade name was found live on Amazon this session, so those brands are named here and not linked. The NSF rows are the evidence that they exist as certified products; which of them is in stock is a separate question. NSF/ANSI 42 is the aesthetic-effects standard: it covers chlorine taste and odor, not lead or cysts. The NSF DWTU search for WF3CB under Standard 053 returned no matching products. A reader who wants a health-effects claim on a PureSource3 refrigerator has no certified WF3CB-fit option in the database, and the [NSF/ANSI standards guide](/water/guides/nsf-ansi-water-filter-standards-explained/) explains what each number covers. ## Does the EPTWFU01 replace the WF3CB? Not on the certification record. The NSF DWTU listing for the EPTWFU01 trade name places its cross-fits on element EFF-6047S at a 200 gallon service cycle and 0.5 gpm, certified to NSF/ANSI 42, 53 and 401. The WF3CB family sits on EFF-6040S at 300 gallons under NSF/ANSI 42 alone. | Spec | WF3CB cross-fits | EPTWFU01 cross-fits | |---|---|---| | Certified element (NSF DWTU) | EFF-6040S | EFF-6047S | | Service capacity (NSF DWTU) | 300 gallons | 200 gallons | | Flow rate (NSF DWTU) | 0.5 gpm | 0.5 gpm | | Standards (NSF DWTU) | NSF/ANSI 42 | NSF/ANSI 42, 53, 401 | | Fit | PureSource3 housing, by trade-name pairing | Round push-twist housing, by trade-name pairing | Several vendor listings imply the EPTWFU01 is the WF3CB upgrade. No Frigidaire statement to that effect was found this session, and the certified data argues the other way: a different element number and a 100 gallon lower capacity. Until Frigidaire publishes a supersession note, this page counts the two as separate cartridges, and the [ULTRAWF page](/water/parts/frigidaire-ultrawf-puresource-ultra-refrigerator-filter/) covers where the EPTWFU01 family does fit. ## How often does the WF3CB need replacing? Frigidaire's interval is not printed here because its page never loaded. The only published figure is the cross-fits' 300 gallon service capacity from the NSF DWTU listing, and none of the listings gives a months figure. At 0.5 gpm, 300 gallons is 600 minutes of dispensing. How many months that is depends on how much water and ice the household draws. The condition that shortens it is the one the standard measures: chlorine taste returning at the dispenser. The [cartridge life calculator](/water/calculators/water-filter-cartridge-life-calculator/) turns a gallons rating and a daily draw into a date. **Before you buy a WF3CB** The honest gap on this page is that the genuine Frigidaire WF3CB has no capacity, interval or certification figure this page could verify: Frigidaire's site did not respond, and NSF's database has no row under the Frigidaire name. The 300 gallon, 0.5 gpm, NSF/ANSI 42 figures belong to the cross-fits. Buy the genuine cartridge if your old one reads WF3CB and you want the maker's part; buy nothing yet if the old one reads EPTWFU01 or ULTRAWF, because neither is a WF3CB in the certification record, and skip every WF3CB-fit cartridge if you need a lead or cyst claim, since none carries NSF/ANSI 53. ## The picks - **Frigidaire WF3CB PureSource3 genuine cartridge**: Old cartridge reads WF3CB and you want the maker's part (1 count per the listing title; Frigidaire's own capacity and interval were unreachable this session; no NSF listing under the Frigidaire company name) Amazon: https://www.amazon.com/dp/B0045LLC7K/?tag=ownerspec-20 ## Frequently asked questions ### What standard is a WF3CB-compatible refrigerator filter certified to? NSF/ANSI 42, the aesthetic-effects standard. The NSF DWTU listing for the WF3CB trade name shows every certified cross-fit model, all on element EFF-6040S, with one claim: chlorine reduction with improved taste and odor. A search of the same database for WF3CB under NSF/ANSI 53, the health-effects standard for lead and cysts, returned no matching products. ### How many gallons does a WF3CB-compatible cartridge last? The NSF DWTU listing for the WF3CB trade name states a service capacity of 300 gallons at a flow rate of 0.5 gpm. That is the certified figure for the cross-fit cartridges, not a Frigidaire figure: Frigidaire's own WF3CB page did not respond when this page was researched, so its capacity and months interval are not printed here. ### Does the EPTWFU01 have the same certified capacity as the WF3CB? No. EPTWFU01-compatible cartridges are certified on element EFF-6047S with a service cycle of 200 gallons at 0.5 gpm, per the NSF DWTU listing for that trade name. WF3CB-compatible cartridges are certified on element EFF-6040S at 300 gallons. A different element and a different capacity mean the two are separate cartridges in the certification record. ### Is there an NSF/ANSI 53 certified WF3CB-compatible filter for lead? Not under the WF3CB trade name. The NSF DWTU search for WF3CB filtered to Standard 053 returned no matching products, so the certified WF3CB cross-fits carry NSF/ANSI 42 only. The EPTWFU01 family does reach NSF/ANSI 53 and 401, but it is certified on a different element (EFF-6047S) and this page does not count it as a confirmed WF3CB fit. ### Is the genuine Frigidaire WF3CB itself NSF certified? The NSF DWTU database returned no listing under the company name Frigidaire, so this page cannot confirm a certification for the genuine part from the database. The certified rows under the WF3CB trade name belong to cross-fit makers such as Waterdrop, AquaCrest, Maxblue, Overbest and Umi. Any certification claim on the genuine cartridge's packaging is Frigidaire's own statement. ## Sources - [NSF, DWTU official listing for trade name WF3CB (element EFF-6040S, NSF/ANSI 42, 300 gallons at 0.5 gpm, chlorine taste and odor reduction)](https://info.nsf.org/Certified/DWTU/listings.asp?TradeName=WF3CB) (standards or certification body) - [NSF, DWTU official listing for trade name EPTWFU01 (element EFF-6047S, NSF/ANSI 42, 53 and 401, 200 gallons at 0.5 gpm)](https://info.nsf.org/Certified/DWTU/listings.asp?TradeName=EPTWFU01) (standards or certification body) - [NSF, DWTU company search for Frigidaire (no matching products)](https://info.nsf.org/Certified/DWTU/listings.asp?Company=Frigidaire) (standards or certification body) - [NSF, DWTU listing search for trade name WF3CB under NSF/ANSI 53 (no matching products)](https://info.nsf.org/Certified/DWTU/listings.asp?TradeName=WF3CB&Standard=053) (standards or certification body) --- Citation: OwnerSpec, "Frigidaire WF3CB PureSource3 Filter: What Fits, Which Cross-Fits Are NSF Listed, and Why the EPTWFU01 Is Not the Same Cartridge", https://ownerspec.com/water/parts/frigidaire-wf3cb-puresource3-refrigerator-filter/, facts verified 15 September 2026. 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