← Back to Master Cross-Reference Directory • Category: Fridge Water Filter RFID Cross-Reference • Nominal Spec: EPTWFU01 (1.85" OD x 8.80" H)

Fridge Water Filter RFID Cross-Reference

Frigidaire EPTWFU01 PureSource Ultra II vs. ULTRAWF Stem Length & $14 NSF-401 Replacements

Frigidaire EPTWFU01 (PureSource Ultra II, 'EPTWFU01 / EWF02') is a push-in stem filter (≈2.0" OD x 8.6" L incl. stem) for 2018+ Frigidaire/Gallery/Professional French-door fridges. It replaces the twist-type ULTRAWF; the stem is not backward compatible. No RFID.

⚠ CRITICAL COMPATIBILITY RULE: EPTWFU01 = push-in stem, ULTRAWF = twist head — not interchangeable. Waterdrop's Frigidaire collection lists stem-fit EPTWFU01 replacements; for a no-cartridge option use Frizzlife MS99 inline with code GLOSSYKOALA.

Verified Reddit Fit Complaint: r/Appliances — 'Frigidaire EPTWFU01 push-to-lock housing cracks with off-spec stems'

Side-by-Side Exact Caliper & RFID Compatibility Matrix

Measured to 1/8" (0.125") Tolerance

OEM Brand & Model	Exact Caliper Size (In)	MERV / NSF Cert	Slot Fit / RFID Chip Status	OEM Price	Verified Multi-Pack Match	Direct Spec Links
Frigidaire PureSource Ultra II EPTWFU01 (OEM) Group: Frigidaire/Gallery French door 2018+	2.0" OD x 8.6" L (incl. stem) 2" x 8-5/8"	NSF/ANSI 42, 53, 401	Push-in stem, no RFID	$49.99 (1-Pack)	OEM benchmark $49.99 Save —	Verify Exact Fit → Amazon
Frigidaire EWF02 (Same as EPTWFU01) Group: EPTWFU01 family	2.0" OD x 8.6" L 2" x 8-5/8"	NSF/ANSI 42, 53	Push-in stem	$49.99	Waterdrop Frigidaire collection see link Save ~35%	Verify Exact Fit → Amazon
Waterdrop EPTWFU01 replacement Group: EPTWFU01 family	2.0" OD x 8.6" L 2" x 8-5/8"	NSF/ANSI 42, 53, 401	Matching stem	$49.99	Waterdrop Frigidaire (8% link) see link Save ~35%	Verify Exact Fit → Amazon
Frigidaire PureSource Ultra ULTRAWF (Older — NOT compatible) Group: Pre-2018 side-by-side	2.0" OD x 8.2" L 2" x 8-3/16"	NSF/ANSI 42, 53	Twist head — won't fit stem housing	$44.99	Check housing type first — Save —	Verify Exact Fit → Amazon
Frizzlife MS99 0.5-Micron Inline Fridge Filter (Bypass Kit) Group: EPTWFU01 fridges (bypass)	2.56" OD x 10.0" L, 1/4" quick-connect 2-9/16" x 10"	NSF/ANSI 42 & 53 (lead, cysts)	No cartridge keyway or chip — runs with factory bypass plug installed	n/a	Frizzlife MS99 Inline — use code GLOSSYKOALA for 10% off $75.99 (≈$68.39 w/ GLOSSYKOALA) Save Lowest cost/gal	Verify Exact Fit → Amazon

Frequently Asked Fit & Bypass Questions

Q: Is EPTWFU01 the same as ULTRAWF?

No — EPTWFU01 is push-in stem; ULTRAWF twists in.

Q: Is EWF02 the same as EPTWFU01?

Yes, EWF02 is the alternate part number.

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