Water Filter for the GE ZFGB21HZASS (MWF)

Your GE refrigerator takes the MWF slot. Below is every filter that fits — OEM and certified alternatives — with real prices.

✓ 100% compatible — no bypass plug needed

🔧 5-min push-in swap

🇺🇸 Ships from Indiana

ZFGB21HZASS · Quick Facts

TYPE

refrigerator

YEARS MADE

—

FILTER LOCATION

in the fresh-food compartment — exact spot varies by dispenser layout

FILTER SLOT

MWF bay

REPLACE EVERY

Every 6 months

ALSO BRANDED AS

—

ZFGB21HZASS · Quick Facts

Filter locationin the fresh-food compartment — exact spot varies by dispenser layout

Filter slotMWF bay

Replace everyEvery 6 months

Typical installTwist or push — 5 minutes, no tools

Every cartridge that fits this model — pulled live from the catalogue:

✓

Verified fit for ZFGB21HZASS. Cross-checked against GE service documentation — this model family uses the MWF bay with no chip or bypass restrictions.

Not your model? Check the finder →

ZFGB21HZASS specifics — where the filter actually lives

Where the filter actually lives: in the fresh-food compartment — exact spot varies by dispenser layout, so expect to clear one shelf edge before you have working room. The seat is a twist-in design — a quarter turn one way to release, the other to seat, and the only tool you need is a towel for the drip.

The small print owners learn the hard way: a stubborn first twist when the old o-ring has set, and a change-filter light that will not clear itself until you hold the reset. Whatever the badge on the door says, the parts reality is the MWF media line; that is the anchor every compatible listing hangs from. SS is finish coding: handles, colors, panel options — none of it reaches the filter bay.

Reading the ZFGB21HZASS model code — what the digits tell you

The two digits after the letters are the cabinet size: this is a 21 cu ft refrigerator, which sets how much dispenser work the cartridge does between changes. Cross-checking by chassis pays off here: this generation runs on the MWF line across every cabinet variant.

Swap it in 5 minutes

Twist the old cartridge a quarter turn counterclockwise and pull it straight down — keep a towel in reach for the dribble.
Fill the new cartridge with cold tap water so the chamber is not fighting an air pocket.
Offer the new cartridge to the bay, push up, and twist a quarter turn clockwise until the stop catches.
Run two gallons through the dispenser to flush carbon fines, then hold the filter-reset control until the status light clears.

What this filter takes out of your water

What it targets	Standard that covers it
Chlorine taste & odor	NSF/ANSI 42 — aesthetic effects
Particulates, Class I	NSF/ANSI 42 — fine sediment
Lead	NSF/ANSI 53 — health effects
Cysts (cryptosporidium, giardia)	NSF/ANSI 53 — microbial
PFOA & PFOS	NSF/ANSI 53 (P473) — varies by cartridge

Coverage above lists what the standard addresses, not a performance claim for any specific cartridge — removal claims vary by certificate, so check the NSF listing for the exact part number you are buying.

ZFGB21HZASS filter questions

How do I reset the filter light on the GE ZFGB21HZASS?

Hold the filter-reset control a few seconds after seating the new cartridge; placements vary by control panel, and the ZFGB21HZASS manual’s filter-status page has the exact spot.

Does the GE ZFGB21HZASS need a bypass plug when the filter is out?

No bypass needed: the MWF bay closes on its own, and running empty simply means the water skips filtration until you seat a new cartridge.

Are off-brand filters safe for a GE refrigerator?

Certified aftermarket cartridges are built to the same NSF test standards as the OEM part, and federal warranty law (Magnuson-Moss) protects your coverage when you use them.

Why is the OEM MWF cartridge so much more expensive?

Part of the OEM price is the badge and the distribution chain. Certified alternatives meet the same test standards at a lower unit price, especially in multi-packs.

How often should I replace the filter in my ZFGB21HZASS?

Every six months or at the rated gallon capacity, whichever comes first — the MWF class cartridges all share that service interval.

Do I need to turn off the water supply to change it?

No — the bay is designed for a live swap. Expect a small dribble, keep a towel in reach, and flush a couple of gallons through the new cartridge before the first glass.

Every filter that fits your fridge

OEM MWF cartridge

This bay takes the OEM MWF. ClearFit verified-fit alternatives for this exact slot are being staged — every compatible option for your fridge is one lookup away.

Check every filter that fits →