LG LT1000P Replacement Filter (2026): Which One to Buy
Guide
Your LG fridge wants a new LT1000P, and the replacement filter listings split into three camps: the genuine LG cartridge, name-brand compatibles at about half the price, and multipacks cheaper still. The cartridges all look like the same slim white tube. The differences are in the certification, the fit tolerances, and how many of the “genuine” listings are actually genuine.
Here is the short answer: the genuine LG LT1000P is the cartridge LG states is certified against NSF/ANSI 42, 53 and 401 — the widest stated claim set of any common fridge filter — and a year of genuine cartridges runs roughly $60–80. Listed compatibles bring a year under $40 but hold NSF/ANSI 42 listings at best. With this model, the smart move is genuine from a seller you can verify — LG even publishes the tells that separate a real cartridge from a fake.
Check Current PriceTable of Contents
Quick verdict
Buy the genuine LT1000P from a verifiable seller. LG states the cartridge is certified to NSF/ANSI 42, 53 and 401 — chlorine, lead and asbestos, and emerging contaminants including pharmaceuticals — at 200 gallons or 6 months. That claim set is the reason to own this filter, and no compatible matches it on paper. Buy a listed compatible (Waterdrop, ICEPURE) only if your water concern is taste and odor alone: the savings are real (under $40 a year vs $60–80), the fit is generally good, and the certification is thinner. Our LT1000P fit, reset and cost guide covers the install side in full.
First, confirm the LT1000P is your filter
The LT1000P is LG’s slim internal cartridge, mounted in the ceiling of the fresh-food compartment — usually top-left — behind a small cover, feeding both the dispenser and the ice maker. LG’s performance data sheet lists several codes for the same filter family, so any of these on your old cartridge means the LT1000P is your replacement:
| Part number | What it is |
|---|---|
| LT1000P | Current LG part number |
| LT1000PC / LT1000PCS | Same filter family, per LG’s performance data sheet |
| ADQ74793501 / ADQ747935 | LG system code printed on packaging |
| ADQ75795105 | Alternate LG system code |
| AGF80300704 / AGF80300705 | LG regional part codes |
Do not confuse it with the older LT700P — a different cartridge with a different housing, still sold for earlier LG models. The label on your old cartridge, or the rating plate inside the fridge, settles it in seconds.
Your replacement options, compared
| Option | Price per filter | Certification | Rated life | Best for |
|---|---|---|---|---|
| Genuine LG LT1000P | ~$30–40 | NSF/ANSI 42, 53, 401 — stated by LG | 6 months / 200 gal | The full claim set, incl. lead |
| Listed compatible (Waterdrop, ICEPURE) | ~$15–20 | NSF/ANSI 42 listings at best — no 53/401 | 6 months / 200 gal (claimed) | Taste and odor on a budget |
| No-name multipack | ~$9–12 | Seller’s own claims only | 6 months / 200 gal (claimed) | Rock-bottom price, unverified claims |
Two changes a year makes the yearly math simple: roughly $60–80 genuine against under $40 for a listed compatible — a smaller gap than most fridge filters, because the LT1000P’s genuine street price is comparatively sane. What the extra buys is the stated 53/401 coverage: certified-style claims for lead, asbestos and pharmaceuticals that compatibles do not carry.
Check Current PriceHow to verify a genuine LG cartridge
LG is unusually helpful here — per lg.com, a genuine LT1000P carries three checkable tells:
- The LG logo printed on the cartridge itself.
- A hidden LG watermark on the label that appears when you shine a flashlight across it.
- An LG hologram label on the packaging.
Run those checks on any cartridge that arrives priced well below the genuine street range. A “genuine” LT1000P at a multipack price, with no watermark and a plain box, is a compatible in costume — send it back rather than installing it.
Fitting your replacement
Open the ceiling compartment cover, pull the old cartridge down and out, push the new one up until it seats, and close the cover. Flush about 2.5 gallons through the dispenser — LG’s own guidance — to clear air and carbon fines, then reset the indicator by holding the Water Filter button for about 3 seconds until the light clears. If your panel uses a different button combination, our all-brands filter reset guide collects the variants. The full step-by-step, including the stubborn cases, is in our LT1000P replacement guide.
Conclusion
The LT1000P is the fridge filter where genuine makes the strongest case: the widest stated certification in its class, a modest genuine street price, and published anti-counterfeit tells you can check in ten seconds with a flashlight. Buy it genuine from a seller you can name, verify the watermark when it arrives, and change it at 6 months or 200 gallons. Compatibles save perhaps $25–40 a year — worth it only if taste and odor are the whole story for your water.
Update log
October 2026: Guide published with certification statements and genuine-verification tells checked against lg.com and LG’s performance data sheet, and prices taken from current retailer listings.
FAQs
What is the difference between the LT1000P, LT1000PC and LT1000PCS?
They are the same filter family. LG’s performance data sheet lists LT1000P, LT1000PC and LT1000PCS together, with system codes ADQ74793501 and ADQ75795105 — packaging and channel variants of one cartridge. Any of them fits an LT1000P housing.
Does the LT1000P remove lead?
LG states the LT1000P is certified against NSF/ANSI 53, which includes lead reduction, alongside 42 (chlorine, taste and odor) and 401 (emerging contaminants such as pharmaceuticals). Compatible LT1000P cartridges do not carry the 53 claim — their listings top out at NSF/ANSI 42.
Is the LT1000P the same as the LT700P?
No. The LT700P is an earlier LG cartridge (the ADQ36006101 family) with a different housing and fit. An LT700P will not seat correctly in an LT1000P compartment, and vice versa. Match the part number on your old cartridge before ordering.
How long does an LT1000P last?
The rated life is 6 months or 200 gallons, whichever comes first. The fridge’s indicator is a timer on that schedule, not a sensor — heavy use or sediment can exhaust a cartridge sooner, and slowing dispenser flow is the practical sign.
How can I tell if my LT1000P is genuine?
Per lg.com, check three things: the LG logo on the cartridge, a hidden LG watermark on the label that appears when you shine a flashlight across it, and an LG hologram label on the packaging. A cartridge missing those — especially one bought far below the genuine street price — is likely a counterfeit or a relabeled compatible.
How do I reset the LG filter light after replacing the LT1000P?
Press and hold the Water Filter button on the dispenser panel for about 3 seconds, until the indicator light clears. Changing the cartridge alone does not reset it. If the light stays on, make sure the new cartridge is fully seated, then try the hold again.
