Water Filter for the GE ZIS420NHC (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

ZIS420NHC · Quick Facts

TYPE

refrigerator

YEARS MADE

—

FILTER LOCATION

low on the fresh-food side or behind the base grille in most side-by-side layouts

FILTER SLOT

MWF bay

REPLACE EVERY

Every 6 months

ALSO BRANDED AS

—

ZIS420NHC · Quick Facts

Filter locationlow on the fresh-food side or behind the base grille in most side-by-side layouts

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 ZIS420NHC. 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 →

ZIS420NHC specifics — where the filter actually lives

On the ZIS420NHC, the cartridge low on the fresh-food side or behind the base grille in most side-by-side layouts, so expect to clear one shelf edge before you have working room. It is a twist-lock bay: align the ears, seat it, and rotate until the stop catches — a five-minute job start to finish.

The recurring owner notes: 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. One prefix, one chassis family: it places the machine in GE’s Monogram built-in side-by-side family, which pins down the cartridge line, the reset behavior, and the service documentation worth consulting. Finish codes such as HC change the look, not the plumbing — order the cartridge by model, ignore the finish letter.

ZIS vs PSS — what the prefix tells you

Catalog shorthand: The Monogram built-in side-by-side/Profile side-by-side split tracks the ZIS/PSS prefixes — cartridge fit follows the water path, not the label on the door. read the code as 42 cu ft of capacity, which tells you the cartridge’s real workload between changes.

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.

ZIS420NHC filter questions

Filter light reset on the GE ZIS420NHC — how?

The reset is a press-and-hold on the filter control with the cartridge in place; check the ZIS420NHC owner’s manual for where that control sits on your panel.

Does the GE ZIS420NHC need a bypass plug when the filter is out?

You can, but unfiltered — the MWF bay needs no bypass plug; it just passes water through without filtering while the cartridge is out.

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 ZIS420NHC?

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 →