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Water Filter for the LG LRFD25850SB (LT600P)
✓ 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:
✓
LRFD25850SB specifics — where the filter actually lives
Finding the bay is the easy part — this chassis puts it in the fresh-food compartment — exact spot varies by dispenser layout, the same estate every refrigerator in this family uses. This is a push-twist style bay: two motions, one orientation, five minutes including the cleanup.
Field notes: the line is still live when you open the bay, so keep a towel in reach, and expect the filter-status light to need a reset before it believes the new cartridge. What pins the parts choice down is the media line: this chassis drinks from the LT600P family, one of the most cross-referenced cartridges in the LG catalog. Trim code SB: cosmetic variants of one chassis, one cartridge family.
Reading the LRFD25850SB model code — what the digits tell you
Call it a 25 cubic feet box — which is why this cartridge works for a living rather than sitting decorative. Order by cartridge, not by cabinet: the LT600P cartridge is the one constant across the model run.
Swap it in 5 minutes
- Press the release (if fitted), twist the old cartridge free, and pull it from the header.
- Wet the new cartridge’s o-ring with cold tap water so it seats without dragging.
- Push the cartridge square onto the header, then give it the locking quarter turn.
- 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.
LRFD25850SB filter questions
How to reset the water filter indicator: LG LRFD25850SB?
With the new cartridge seated, press and hold the filter reset until the light clears — panel placement differs, so the LRFD25850SB manual’s filter section has the exact control for your trim.
Can I run the LG LRFD25850SB with no cartridge installed?
Nothing to buy — the LT600P housing closes without a cartridge; water runs unfiltered until the next one goes in.
Are off-brand filters safe for a LG 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 LT600P 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 LRFD25850SB?
Every six months or at the rated gallon capacity, whichever comes first — the LT600P 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 LT600P. 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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