FiltersDex

What water filter does a LFX21971ST refrigerator use?

The LFX21971ST uses the LT600P water filter.

Shop the LT600P Amazon · we may earn a commission, at no extra cost to you

Key takeaways

  • Water filter part number: LT600P (LG).
  • NSF certified to reduce 2,4-D, Atrazine, Benzene, Bisphenol A, and more.
  • Replace on your fridge's filter-change indicator, or every ~6 months as a default.
  • A cheaper NSF-certified aftermarket filter can fit the same slot - just confirm its own certification before buying.
Water FilterLT600PLG
300 gal capacity
Removes LeadRemoves Chlorine, taste & odorRemoves Cysts (Cryptosporidium, Giardia)Removes Mercury

Buy the filter for your LFX21971ST

Genuine OEM LT600PThe exact LG LT600P - certified to the NSF claims on this page.Shop LT600P Cheaper filter that fitsAftermarket filters fit the same slot for less - look for one independently NSF 53 certified for the same contaminants before you buy.Shop compatible filters

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

What the LT600P removes

The LT600P is NSF/ANSI certified to reduce the following, grouped by the standard it was tested to:

NSF/ANSI 42 - Taste & odor (aesthetic)

Chlorine, Nominal Particulate, Taste and Odor

NSF/ANSI 53 - Health contaminants

2,4-D, Atrazine, Benzene, Carbofuran, Cyst, Endrin, Lead, Lindane, Mercury, Turbidity

NSF/ANSI 401 - Emerging compounds

Bisphenol A, Estrone, Ibuprofen, Naproxen, Nonylphenol, Phenytoin

Also known as

The LT600P replaces (and is cross-referenced under) these part numbers: 113541, 173560, 2571614, 3660185, 46-9990, 4609990000, 469990, 5231JA2005A, 5231JA2005A-S, 5231JA2006, 5231JA2006A, 5231JA2006A-S, 5231JA2006B, 5231JA2006B-S, 5231JA2006E, 5231JA2006F, 5231JA2006F-S, 5231JA2006H, 5231JJ2001C, 9990, 9990P, AP4439984, APF1000, AQF-110GL, AQF-LT600P, AQUACLEAR504, BRITA-WFBRFLG1, C600P, CF13, CLCH104, CLS30320001, CLS3032001, CW-L2, DWF-10, EFF 6003A, EFF-6003, EFF-6003A, EFF-6004A, EFF6003, EFF6003A, EP-LT600P, FILTERSFAST FF21400, FML-2, GRE1035, HDX-FML-2, LA01, LA50, LGE5231JA2006A, LT600P-B, OPFL-2, OPFL2, OPFL2-RF300, PH21400, PH21400-S, PH21400S, PL-800, PL-800-S, PP1004, PS2441842, PUREH2O PH21400, PURELINE PL-800S, R-9990, REFRESH R9990, RF-L1A, RF-L1A RFC1000A, RWF-1051, RWF1051, SFRL-2, SGF-LA01, SGF-LA50, SGF-LB60, SW-L2, TIER1-RWF1051, TIER1-RWF1051P, USWF_4051_2_PACK, WD-LT600P-1, WF-300, WF-600, WF300, WF600, WFBRFLG1, WFC2001, WSL-2, WSL2.

Also fits these refrigerators

LFD21860STLFD21860SWLFD21870STLFD22860SBLFD22860STLFD22860SWLFD22860TTLFD23860STLFD23860SWLFD25860SBLFD25860STLFD25860SW

Filters for the rest of your home

FiltersDex covers the exact replacement filter - and what it removes - across every appliance:

Air purifier filtersLevoit, Coway, Honeywell, WinixVacuum filtersShark & Dyson, HEPA + foamUnder-sink & RO systemsAPEC, iSpring, Pentair - NSFHumidifier filterswicks + furnace padsWater pitcher filtersBrita, PUR, ZeroWater - NSF

Frequently asked

What water filter does a LFX21971ST refrigerator use?

The LFX21971ST uses the LT600P water filter.

Does the LT600P remove lead?

Yes - the LT600P is NSF/ANSI 53 certified to reduce lead.

Should I buy the OEM filter or an aftermarket one?

The OEM LT600P is the safe, exact-fit choice. A cheaper aftermarket filter can fit the same slot too - just confirm it carries its own independent NSF certification for the contaminants you care about, since a generic aftermarket filter without certification isn't proven to remove anything.

How often should I replace the LT600P?

Most refrigerator filters are replaced every 6 months regardless of the exact model - use your fridge's filter-change indicator as the trigger if it has one.

Where is the water filter on a LFX21971ST?

Location varies by fridge design - commonly inside the fridge compartment (upper right or lower kickplate/grille) or in the water line behind the unit. Check your owner's manual for the exact spot on this model.