LG LT1000P Refrigerator Water Filter (ADQ74793501): Premium Replacement Guide for 2026

Your refrigerator water filter is one of the few household items where the choice you make every six months directly affects what your family drinks, cooks with, and uses for ice. The LG LT1000P is the standard cartridge for most LG French-door refrigerators built since 2017, and it carries one of the highest NSF certification profiles of any residential refrigerator filter on the market. The question most LG owners face is not whether to replace it, but how to do it right and stop forgetting the next replacement date.

This guide covers what the LT1000P actually filters, why the NSF 401 certification matters for households focused on water quality, which LG refrigerators take it, and how subscribe-and-save scheduling solves the "I forgot to order it" problem.

Why the LT1000P Stands Apart

The LT1000P is NSF-certified to three different standards. Most residential refrigerator filters carry NSF 42 (chlorine taste and odor) and sometimes NSF 53 (lead, mercury, cysts). The LT1000P adds NSF/ANSI 401, which is the certification for emerging contaminants: pharmaceuticals, pesticides, and endocrine disruptors.

For households drawing municipal water from urban supply systems, the NSF 401 layer matters. Treatment plants do excellent work on the contaminants they target, but trace pharmaceutical residues and pesticide metabolites are increasingly detected in municipal outflow. The LT1000P is tested to remove or reduce 22 specific contaminants, including:

• Lead and mercury (NSF 53)
• Asbestos (NSF 53)
• Cysts including Cryptosporidium and Giardia (NSF 53)
• Chlorine taste and odor (NSF 42)
• Particulates Class I (NSF 42, the highest particulate class)
• Atenolol, ibuprofen, naproxen, estrone, and BPA (NSF 401)
• Pesticides including atrazine, simazine, and trimethoprim (NSF 401)
• Industrial compounds including TCEP and TCPP (NSF 401)

For a homeowner who cares about water quality beyond basic taste improvement, the NSF 401 certification is the differentiator. It is the same testing standard used on premium under-sink RO systems, applied to a refrigerator cartridge.

LT1000P Quick Specs

The OEM part numbers you may see for the same physical cartridge:

• LT1000P (LG's marketing part number)
• ADQ74793501 (LG's manufacturing part number)
• ADQ75795105 (production variant, same cartridge)
• AGF80300704 or AGF80300705 (regional packaging codes)
• LT1000PC (LT1000P bundled with carbon air filter)
• LT1000PCS (LT1000P bundled with carbon air filter and subscription pack)

All of the above are the same cartridge with different packaging. If your existing filter says any of these numbers on the label, the LT1000P is your match.

Compatible LG Refrigerators

The LT1000P fits most LG French-door refrigerators manufactured from 2017 forward. Compatible model number prefixes include:

• LFXS28968, LFXS26566, LFXS26973 (French-door, fresh food + freezer below)
• LMXS28626, LMXS30796, LMXC23796 (French-door, premium tier)
• LRMVS3006, LMWS27626 (current-generation French-door)
• LRFVS3006 (Door-in-Door French-door)
• LMXC22596 (counter-depth French-door)
• Approximately 80 additional LG French-door variants

If your LG refrigerator was manufactured between 2017 and 2024 and uses a twist-in cartridge in the upper-left corner of the fresh food compartment, the LT1000P is almost certainly the correct filter.

What the LT1000P Does Not Fit

LG changed the cartridge connection geometry between generations. The LT1000P will not fit:

• LG refrigerators using the LT800P (2014-2017 generation, ADQ73613401)
• LG refrigerators using the LT700P (2010-2014 generation, ADQ36006101)
• LG refrigerators using the LT500P (older side-by-side models)
• Kenmore refrigerators that share LG componentry but use modified cartridge keying

The safest verification is to pull your existing cartridge and read the part number on the label.

How to Replace the LT1000P

The replacement is a twist-and-replace operation that takes under two minutes.

1. Locate the cartridge in the upper-left corner of the fresh food section. Most LG models have a small swing-out door covering the filter housing. Some models locate the filter in the bottom grille at floor level.
2. Turn the existing cartridge counter-clockwise approximately a quarter turn. You will feel the cartridge release from the housing.
3. Pull the cartridge straight out. A small amount of water will drip from the seal. Have a paper towel ready.
4. Remove the new cartridge from packaging and pull off the protective cap covering the cartridge stem. Avoid touching the O-ring with bare hands, as oils from your skin can affect the seal.
5. Insert the new cartridge into the housing, oriented to match the housing slot. Push gently and rotate clockwise a quarter turn until the cartridge locks into place.
6. Reset the filter indicator by holding the filter reset button on the refrigerator control panel for 3 to 5 seconds. The "Replace Filter" indicator should turn off.
7. Flush the new cartridge by dispensing approximately 2.5 gallons of water through the dispenser before drinking. The first cup or two may appear cloudy from carbon fines. The cloudiness clears within a minute.
8. Mark the install date if you want a manual reference for the next replacement.

Total active time: under two minutes. Total flush time: about 5 to 10 minutes depending on dispenser speed.

When to Replace the LT1000P

LG specifies replacement every 6 months or 200 gallons of filtered water, whichever comes first. The 6-month calendar interval is the binding constraint for most households.

The refrigerator's "Replace Filter" indicator is calendar-based, not flow-based. It will trigger at the 6-month mark regardless of how much water has actually been filtered. Heavy filtered-water households (large families, frequent ice production) may benefit from replacing slightly before the indicator triggers to maintain optimal contaminant reduction.

Practical signs the cartridge is past due:

• Replace Filter indicator on the control panel
• Reduced flow from the water dispenser
• Returning chlorine taste in filtered water
• Slower ice production (the ice maker draws through the same cartridge)
• Cloudy water that does not clear within a minute of dispensing

Subscribe and Save: Solving the "I Forgot to Order" Problem

The hardest part of refrigerator filter maintenance is not the install. It is remembering to order the next cartridge before you actually need it. Households that subscribe to scheduled cartridge delivery never run into the "Replace Filter" indicator with no replacement on hand.

Our subscribe-and-save program for the LT1000P delivers a fresh cartridge on a 6-month schedule, with a discount on each shipment compared to single-order pricing. You receive the cartridge a few days before the install date, with email reminders if you want them. Skip or pause any shipment without penalty.

For households running NSF 401-certified filtration as part of a broader health-focused water strategy, the subscription model removes the failure mode where the cartridge ages past the replacement interval simply because nobody ordered the next one.

Authentic vs Counterfeit LT1000P

The LT1000P is one of the most counterfeited refrigerator cartridges on the market. Counterfeit cartridges look nearly identical to the genuine LG version but use lower-grade carbon and unverified NSF testing. The cartridge fits the housing and produces water, but you lose the NSF 401 certification that justifies the cartridge price.

Ways to verify authentic LT1000P cartridges:

• NSF certification numbers (42, 53, and 401) printed on the packaging
• LG hologram seal on the side of the box
• Part number consistency across the cartridge body, the box, and the packaging insert
• Purchase from authorized retailers with traceable inventory from LG's distribution network

A counterfeit LT1000P will not reduce pharmaceuticals, pesticides, or endocrine disruptors to NSF 401 standards. For households specifically choosing the LT1000P for its premium contaminant reduction profile, authentic sourcing is essential.

LG Cartridge Lineup at a Glance

For households unsure which LG cartridge their refrigerator uses:

Verify by checking the part number printed on your existing cartridge before ordering.

Ordering the LT1000P

Poseidon Filters carries the authentic LG LT1000P (ADQ74793501) for residential and office refrigerators. Each cartridge is genuine LG manufacture, NSF-certified to 42, 53, and 401, and backed by our satisfaction guarantee.

Order options:

• Single cartridge for one-time purchase
• 2-pack for households that want a backup on hand
• 3-pack for full-year coverage with one order
• Subscribe and save for scheduled 6-month delivery with reorder discount

For households or offices uncertain which LG cartridge fits, our support team verifies compatibility by refrigerator model number before you order. Call 855-789-3278 or email info@poseidonfilters.com.

Frequently Asked Questions

How long does the LT1000P last?
Six months or 200 gallons of filtered water, whichever comes first. Most households hit the 6-month calendar mark before the gallon limit.

Is the LT1000P the same as the ADQ74793501?
Yes. LT1000P is the marketing part number, ADQ74793501 is LG's manufacturing part number. Same physical cartridge.

Does the LT1000P remove fluoride?
No. The LT1000P removes lead, mercury, chlorine, cysts, pharmaceuticals, pesticides, and emerging contaminants. Fluoride removal requires a reverse osmosis system.

Why does the LT1000P cost more than other refrigerator filters?
The NSF 401 certification adds testing for pharmaceuticals, pesticides, and emerging contaminants that most other refrigerator filters do not address. The LT1000P also uses a denser carbon block to support the broader reduction profile.

Can the LT1000P fit my LG side-by-side refrigerator?
The LT1000P fits LG French-door refrigerators primarily. Older LG side-by-side models typically use the LT500P. Verify by checking the part number on your existing cartridge.

Will subscribe-and-save lock me into a long commitment?
No. The subscription delivers a cartridge every 6 months at a discount. You can skip, pause, or cancel any shipment without penalty through your account.

Is the LT1000P safe for households with health-sensitive members?
The LT1000P is NSF-certified to remove or reduce 22 contaminants including pharmaceuticals and emerging contaminants. For households with infants, immunocompromised members, or specific water quality concerns, the LT1000P's certification profile is among the strongest available in a refrigerator cartridge.

Ready to replace your LG LT1000P? Order the authentic LG LT1000P (ADQ74793501) from Poseidon Filters as a single cartridge, multi-pack, or subscribe-and-save. NSF 42/53/401 certified for premium contaminant reduction. Questions on compatibility, call 855-789-3278.