Frigidaire EPTWFU01 PureSource Ultra II Filter: What It Is Certified For, How It Differs from ULTRAWF, WF3CB and FPPWFU01, and Which Cross-Fits Are NSF Listed

Do not buy a cross-fit because the box reads EPTWFU01: none of the three brands with an NSF row for this cartridge surfaced on Amazon this session, and the dozen that did have no row under their own name.

Which refrigerators take the EPTWFU01?

Frigidaire’s product page calls the EPTWFU01 the PureSource Ultra II Water and Ice Refrigerator Filter, lists alternate part number 807946701, and locates it at the back top-right with a push and twist action. Its compatible-model list sits behind a model-number checker, so this page prints no model list: match the number on the old cartridge.

The Frigidaire EPTWFU01 is the genuine part, listed as a single cartridge. Frigidaire’s page warns that an underpriced look-alike may be counterfeit.

Check price on Amazon

Frigidaire sells four cartridge families, and they do not interchange: it keeps separate install articles for the PureSource Ultra (ULTRAWF) and the PureSource Ultra II (EPTWFU01).

What is the EPTWFU01 certified for?

Frigidaire’s performance data sheet (P/N A02536409) states the PureSource Ultra II using cartridge EPTWFU01 is certified by IAPMO R&T against NSF/ANSI Standard 42, Standard 53, Standard 401 and CSA B483.1, and NSF/ANSI/CAN 372. IAPMO R&T is the certifier, which is why the NSF DWTU database lists nothing under the Frigidaire name.

The sheet’s reduction table is the citable part. A selection of its rows, as printed:

The sheet adds that testing was performed under standard laboratory conditions and actual performance may vary. The NSF/ANSI standards guide explains what each number covers.

What else fits the same housing?

The NSF DWTU listing for the EPTWFU01 trade name shows every certified cross-fit from one maker, Qingdao Ecopure Filter Co., on element EFF-6047S at a 200 gallon service cycle and 0.5 gpm. The standard depends on the suffix, and the base part numbers carry NSF/ANSI 42 alone.

None of those trade names surfaced on Amazon US this session. The cross-fits that did surface (GLACIER FRESH, 4U PURE, ICEPURE, PUREPLUS and others) have no NSF DWTU row under their own trade name in the searches run, so none is linked here.

The WF3CB and ULTRAWF cross-fits are listed at 300 gallons at 0.5 gpm; the EPTWFU01 cross-fits at 200. The genuine EPTWFU01 is rated by Frigidaire at 125 gallons and 0.65 gpm, below its own cross-fits, with a far longer reduction table. The OEM versus generic guide weighs that trade-off.

How often does the EPTWFU01 need replacing?

Frigidaire’s data sheet says the cartridge must be replaced every 6 months or sooner. The product page turns that into a table by household size, with a footnote assuming 0.5 gallons per person per day, 60 percent of the household’s water drawn through the refrigerator and a rated capacity of 125 gallons.

Frigidaire names heavy dispenser use and high sediment as reasons to change earlier. The cartridge life calculator turns the gallons rating and your daily draw into a date; the filter by model guide maps every brand to its cartridge.

Frequently asked questions

Sources

1. Frigidaire, Performance Data Sheet, PureSource Ultra II using replacement cartridge EPTWFU01 (P/N A02536409): capacity 125 gallons, service flow 0.65 gpm, replace every 6 months or sooner, certified by IAPMO R&T against NSF/ANSI 42, 53, 401, CSA B483.1 and NSF/ANSI/CAN 372, substance reduction table (manufacturer or vendor document)
2. Frigidaire, PureSource Ultra II Water and Ice Refrigerator Filter EPTWFU01 product page: 6 month interval, family-size table, 0.5 gal per person per day and 60 percent usage assumptions, flow rate 0.65 gpm, rated capacity 125 gallons, alternate part number 807946701, push and twist installation, filter location back top-right (manufacturer or vendor document)
3. NSF, DWTU official listing for trade name EPTWFU01 (Qingdao Ecopure Filter Co., element EFF-6047S, 200 gallons at 0.5 gpm; NSF/ANSI 42 on all rows, 53 on the -D, -P, WDP and WDS rows, 401 on the -D and WDP rows) (standards or certification body)
4. NSF, DWTU official listing for trade name WD-EPTWFU01 (Waterdrop, element EFF-6047S, NSF/ANSI 42 only, 200 gallons at 0.5 gpm) (standards or certification body)
5. NSF, DWTU official listing for trade name WF3CB (cross-fit cartridges on element EFF-6040S, NSF/ANSI 42, 300 gallons at 0.5 gpm) (standards or certification body)
6. NSF, DWTU official listing for trade name AQF-ULTRAWF (NSF/ANSI 42, 300 gallons at 0.5 gpm) (standards or certification body)
7. NSF, DWTU company search for Frigidaire (no matching products) (standards or certification body)
8. Frigidaire owner support, How To Install Your PureSource Ultra II Water Filter (article body did not render; title and the separate ULTRAWF article confirmed) (manufacturer or vendor document)