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Water Filter for the Samsung RS25H5121WW (DA29-00020B)
✓ 100% compatible — no bypass plug needed
🔧 5-min push-in swap
🇺🇸 Ships from Indiana
Every cartridge that fits this model — pulled live from the catalogue:
✓
RS25H5121WW specifics — where the filter actually lives
On the RS25H5121WW, the cartridge bottom of the fresh-food column or at the grille line in most side-by-side builds, a deliberate placement that keeps the swap away from the door seals and drawer rails. Mechanically the RS25H5121WW uses a push-in cartridge; the header accepts the cartridge one way; when it slides without force, it is aligned.
The recurring owner notes: keep a folded towel under the bay before you open it; the line holds a cup of water even with the valve shut. Prefix literacy pays here: the RS run is Samsung’s side-by-side series; across the run, the filter bay is one of the constants. Finish letter sets like WW never alter the bay; the DA2900020B line fits the whole set.
RS vs RF — what the prefix tells you
Know your RS from your RF and the cartridge question halves: The side-by-side/French-door multi-door split tracks the RS/RF prefixes — cartridge fit follows the water path, not the label on the door. read the code as 25 cu ft of capacity, which tells you the cartridge’s real workload between changes.
Swap it in 5 minutes
- Pull the old cartridge straight out of the header — expect a small spill, not a flood.
- Align the new cartridge with the keyed slot; it only goes in one orientation.
- Push the cartridge home until the retention latch clicks.
- 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.
RS25H5121WW filter questions
Filter light reset on the Samsung RS25H5121WW — how?
With the new cartridge seated, press and hold the filter reset until the light clears — panel placement differs, so the RS25H5121WW manual’s filter section has the exact control for your trim.
Running the RS25H5121WW with an empty filter bay — does it need a cap?
No — run it empty if you like; the DA2900020B bay needs no bypass plug, it simply passes water through untreated.
Are off-brand filters safe for a Samsung 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 DA2900020B 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 RS25H5121WW?
Every six months or at the rated gallon capacity, whichever comes first — the DA2900020B 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
This bay takes the OEM DA29-00020B. 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 →This filter expires six months from today
Your HVAC filter is probably on a different cycle. Track them all in one place.
months until this filter should be replaced (200-gal rated life)
Free tool · tracks fridge + HVAC + whole-house · auto-refill optional
More models using this filter
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