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Water Filter for the LG LFX31925ST-05 (LT700P)
✓ 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:
✓
LFX31925ST/05 specifics — where the filter actually lives
Where the filter actually lives: in the fresh-food compartment, typically the upper back wall in most French-door layouts, the same estate every French-door refrigerator in this family uses. Mechanically it is a push-and-twist seat: offer the cartridge to the header, press, and rotate until the stop catches; a towel handles the dribble.
Field notes: plan on a towel for the first pull — sitting water in the line — and a five-second reset hold once the fresh cartridge is in. The LF in LFX31925ST/05 is doing real work: the LF run is LG’s French-door series; across the run, the filter bay is one of the constants. Revision 05 changed trim details, not the water circuit; order with confidence by model stem.
LF vs LS — what the prefix tells you
Same parts shelf, two cabinet missions — LF answers to French-door; LS answers to side-by-side; the water-filter answer is shared. Cabinet decode: 31 cu ft — the number that tells you whether this cartridge feeds a family-size dispenser or a compact one.
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.
LFX31925ST/05 filter questions
How to reset the water filter indicator: LG LFX31925ST/05?
Press and hold the reset control until the light clears (a few seconds), with the new cartridge already seated — the LFX31925ST/05 owner’s manual lists the button location for your control panel.
Can I run the LG LFX31925ST/05 with no cartridge installed?
No bypass needed: the LT700P 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 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 LT700P 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 LFX31925ST/05?
Every six months or at the rated gallon capacity, whichever comes first — the LT700P 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
| Cartridge | OEM LT700P | RECOMMENDEDLT700P Replacement Water Filter · 1-Pack – ClearFit |
|---|---|---|
| Price | OEM list | $15.49 |
| Verified fit | ✓ the bay cartridge | View & buy → |
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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