LG Refrigerator Water Filter Guide (2026): LT1000P vs LT700P vs LT800P Decoded

Quick Answer: Most LG French-door and InstaView refrigerators take the LG LT1000P (part ADQ74793501), earlier models take the LT700P (ADQ36006101) or LT800P (ADQ73613401), and older models use the LT500P or LT600P. They are not interchangeable, and the code on your old cartridge is the only reliable guide. The genuine LT1000P is rated for 200 gallons or six months and costs $54.99 for one on LG.com, or about $35 to $46 a cartridge in multipacks and on Amazon (prices checked October 30, 2026). The catch: NSF’s public database lists LG’s LT800P and LT600P but, when we checked, not the LT1000P or LT700P. If you want a cartridge you can verify yourself, an NSF-listed replacement such as the Waterdrop Plus WDP-LT1000P is the cheaper and more checkable route.

Almost everyone who searches for an LG refrigerator water filter has an old cartridge in hand and a filter light blinking. LG’s lineup makes that harder than it should be: five LT codes, each with two to four ADQ or AGF part numbers, Kenmore cross-references (many Kenmore Elite fridges were built by LG), and a market full of lookalike cartridges. Below we decode each one against NSF’s own certification listings, checked October 30, 2026, rather than the box art, and price them from Amazon’s live listings on the same day.

This is the LG-only companion to our best refrigerator water filter rankings, in the same format as our Samsung refrigerator water filter and GE water filter guides.

LG refrigerator water filters compared at a glance

The LT1000PC and LT1000PCS you will see on boxes are the same LT1000P water filter sold as a combo with LG’s LT120F fresh-air filter; LG’s own LT1000P and LT120F bundle listed at $59.99 on Amazon on October 30, 2026.

LG fridge filters by the numbers

• 200 gallons or six months is LG’s rating for the LT1000P, LT700P and LT800P. That is about 1.1 gallons a day over six months, a third less water than the 300 to 316 gallons NSF lists for Samsung’s current cartridges. LG’s Amazon listing for the LT1000P goes further and says LG recommends a change every 3 to 6 months.
• 11 NSF/ANSI 53 claims appear in NSF’s listing for LG Electronics’ LT800P (ADQ73613401): lead, cysts, mercury, asbestos, benzene, atrazine, 2,4-D, carbofuran, lindane, p-dichlorobenzene and toxaphene. The LT600P (5231JA2006A) is listed with 8. Neither LG entry includes NSF/ANSI 401.
• 0 NSF entries turned up for the genuine LT1000P or LT700P when we searched NSF’s database by brand, LT code and ADQ part number on October 30, 2026. An independent directory checker, TapWaterData, reported the same result for the LT1000P across the NSF, IAPMO R&T and WQA directories in August 2026.
• 7 brand names, 1 cartridge: NSF lists Amazon Basics, Waterdrop, Insignia, Best Buy Essentials, Maxblue, Aqua Crest and a “Fridge filters” brand as versions of the same EFF-6046S LT1000P replacement made by Qingdao Ecopure Filter Co. The suffix on the model code decides what each one is certified for.
• Only 2 of 18 counterfeit fridge filters removed lead for a full six-month life in testing published by the Association of Home Appliance Manufacturers (AHAM) in 2018, and 7 of 8 counterfeits failed to remove 90% of cysts.

1. LG LT1000P (ADQ74793501) — the filter most current LG fridges take

The LT1000P is the LG filter most people need, and the one with the broadest claims. LG’s Amazon listing says “only genuine LG Water Filters are certified by NSF International” to NSF 42, 53 and 401, which on paper puts it level with Whirlpool’s EveryDrop on certification breadth. The problem is verification: NSF’s public database, which lists LG Electronics as a certified company and shows its LT800P and LT600P entries, returned no LT1000P or ADQ74793501 entry when we searched on October 30, 2026. Certifications can sit under a supplier’s listing name that is hard to find, so treat this as unverified rather than false, and ask LG for the performance data sheet if it matters to you. Price-wise, never buy singles: LG.com’s four-pack ($139.99) works out to $34.99 a cartridge and Amazon’s three-pack to $38.33, against $54.99 for one cartridge on LG.com.

2. LG LT700P (ADQ36006101) — earlier French-door models

The LT700P covers a large installed base of LG French-door refrigerators from before the LT1000P took over, and a lot of Kenmore Elite fridges sold under the 9690 cross-reference. LG’s claims for it are narrower than for the LT1000P (NSF 42 and 53, no 401), and like the LT1000P it did not appear in NSF’s public listing when we checked. At $49.99 for one genuine cartridge, it is also the filter where the aftermarket saving is largest: NSF lists LT700P replacements from Waterdrop, Amazon Basics, Maxblue, Aqua Crest and Overbest, all built on the same EFF-6032S cartridge.

3. LG LT800P (ADQ73613401) — the LG filter you can verify

If your fridge takes the LT800P, you are in the best position of any LG owner: the genuine cartridge shows up in NSF’s database under LG Electronics’ own name, with a full list of 11 health-effect claims you can read for yourself. LG.com prices it like the LT1000P ($54.99 single, $79.99 for two, $114.99 for three), so the two- or three-pack is the better way to buy it.

4. LG LT500P and LT600P — older models, mostly side-by-sides

These two are easy to confuse because both fit older LG side-by-sides. The LT500P is the high-capacity one (500 gallons) but it is only certified for taste and odor, not for lead, so its bigger number is not a better filter. If you are on older plumbing and lead is the worry, its rating is the weak point, and a certified under-sink water filter is a better place to spend money than the fridge.

5. Waterdrop Plus WDP-LT1000P — the aftermarket you can look up

On an LG, buying aftermarket mostly comes down to choosing the right suffix. Waterdrop sells three LT1000P versions, and NSF lists them differently: the basic WD-LT1000P is certified only to NSF 42 (taste and odor), the WDS-LT1000P adds 5 NSF 53 claims including lead, and the WDP-LT1000P adds mercury and the NSF 401 list. At $34.39 for three, the WDP works out to $11.46 a cartridge, under a third of the genuine three-pack price, and unlike the genuine LT1000P you can find it in NSF’s database by model code. The trade-off is LG’s warranty language on non-genuine filters and a shorter health-claim list than LG advertises for the original. For the rest of the brand’s line, see our Waterdrop water filter review.

Seven brands, one cartridge: decoding LT1000P replacements

NSF’s listing for LT1000P-compatible filters names one manufacturer behind most of the big-brand replacements: Qingdao Ecopure Filter Co., which supplies the same EFF-6046S cartridge under at least seven trade names. What differs is which version each brand certified.

Replacement (NSF model code)	NSF 42 (taste)	NSF 53 (lead, cysts)	NSF 401	Amazon price, Oct 30, 2026
Waterdrop WD-LT1000P	Yes	No	No	Varies by pack
Waterdrop WDS-LT1000P	Yes	5 claims	No	Varies by pack
Waterdrop Plus WDP-LT1000P	Yes	6 claims	6 claims	$14.99 single, $34.39 for 3
Amazon Basics AMZN-LT1000P-S	Yes	No	No	$23.97 for 3 (listing says NSF 42 and 372)
Amazon Basics AMZN-LT1000P-P	Yes	6 claims	6 claims	$49.39 for 3 (listing says NSF 42, 53, 401, 372)
Insignia NS-LGLT1000P531 (Best Buy)	Yes	5 claims	No	Sold at Best Buy
Best Buy Essentials BE-LGLT1000P531	Yes	6 claims	6 claims	Sold at Best Buy

The Amazon Basics row is the one to remember. Amazon sells two LT1000P 3-packs under nearly the same name: the $23.97 pack is certified only to NSF 42 and 372 (taste, odor and lead-free materials, not lead reduction), while the $49.39 pack adds NSF 53 and 401. If the listing does not say NSF 53, the cartridge is not certified to reduce lead, whatever the product photo looks like.

How to tell which LG filter you have in 60 seconds

1. Find the filter. It is inside the fresh-food compartment, but where depends on the model. LG’s US support page puts the LT700P at the far back left of the cabinet, has you remove the bottom door bin to reach the LT800P and LT1000P on some models, and puts the LT500P behind the lamp cover under the top shelf.
2. Read the code on the old cartridge. LT1000P, LT700P, LT800P, LT600P, LT500P or one of the ADQ/AGF part numbers in the table above is printed on the label.
3. No label? Read the refrigerator’s model number from the sticker inside the fresh-food compartment and enter it in LG’s filter finder, or check the owner’s manual. Do not match by looks; the LT1000P and LT700P are similar enough to buy the wrong one.
4. Kenmore owner? Many Kenmore Elite fridges were built by LG. Kenmore 9980 is the LT1000P, 9690 is the LT700P and 9990 is the LT600P.

How to replace and reset an LG refrigerator water filter

LG’s US help page (updated September 2026) gives one sequence with model-specific removal steps:

• Close the water supply valve and press the dispenser paddle to drain what is left in the line. LG notes some models let you skip this.
• Remove the old cartridge. LT1000P and LT800P: turn the bottom of the filter counterclockwise (some models first need the bottom door bin out, others use the LT700P method). LT700P: press the button on the housing, pull it down, then toward you. LT600P: rotate the knob counterclockwise until it clicks out. LT500P: take out the top shelf and lamp cover, turn left until the unlocked symbol lines up, pull down.
• Install the new one and turn it clockwise until the lock mark lines up with the reference line.
• Flush about 2.5 gallons (9.5 liters). LG’s pattern is 30 seconds of dispensing, a 60-second pause, repeated for a total of 5 minutes, which clears air and carbon fines.
• Reset the light: hold the Water Filter or Filter Reset button for 3 seconds, until it chimes or the indicator turns off.

Our filter cartridge replacement guide covers intervals for every other filter in the house.

What an LG fridge filter does not do

None of LG’s claims for the LT1000P mention PFAS or chloramine, and none of the LT1000P-compatible cartridges in NSF’s listing carries a PFOA or PFOS claim. That matters because EPA’s 2024 drinking water rule set limits of 4 parts per trillion for PFOA and PFOS, and a growing number of US utilities disinfect with chloramine instead of chlorine. If your water report shows either, a fridge cartridge is the wrong tool; see our best water filter for PFAS and best water filter for chloramine guides.

A fridge filter also only treats water that comes out of the door. If you want filtered water for cooking and coffee too, an under-sink or reverse osmosis system makes the fridge filter a second line of defense rather than the only one.

Genuine or aftermarket: the honest math

Option (LT1000P fridges)	Cost per cartridge	Per year at 2 changes	Per year at 4 changes (LG’s 3-month advice)	Independently verifiable on NSF?
Genuine LT1000P, single (Amazon)	$46.44	About $93	About $186	Not found (Oct 30, 2026)
Genuine LT1000P, 4-pack (LG.com)	$34.99	About $70	About $140	Not found
Amazon Basics certified (NSF 53) 3-pack	$16.46	About $33	About $66	Yes (AMZN-LT1000P-P)
Waterdrop Plus WDP-LT1000P 3-pack	$11.46	About $23	About $46	Yes
Amazon Basics taste-only 3-pack	$7.99	About $16	About $32	Yes, but NSF 42 only, no lead claim

Over five years at two changes a year, the Waterdrop Plus costs roughly $115 against roughly $350 for genuine LG four-packs, a saving of about $235, and it is the option you can check line by line in NSF’s database. The genuine filter’s case rests on fit, LG’s warranty language and its longer advertised claim list. The option we would avoid is the unlisted marketplace clone: AHAM’s counterfeit testing is the reason, and NSF’s listings are free to search. Our NSF certifications explained guide shows how.

The bottom line

The right LG refrigerator water filter is the one whose code came out of your fridge: the LT1000P for most current French-door and InstaView models, the LT700P or LT800P for earlier ones, and the LT500P or LT600P for older models, mostly side-by-sides. All the current ones are rated for 200 gallons or six months, so change them on the gallon count if your household drinks from the door. If you want a cartridge whose certification you can check yourself, the LT800P is the only current genuine LG filter we found in NSF’s listing, and for LT1000P fridges the NSF-listed Waterdrop Plus WDP-LT1000P or the NSF 53 version of the Amazon Basics pack does the job for a fraction of the price. For other brands, see our Samsung, Frigidaire, Whirlpool and GE guides. Frigidaire’s EPTWFU01 has the same 200-gallon rating and the same problem: NSF’s public database lists its aftermarket replacements but not the genuine cartridge.