LG LT1000P vs LT700P: Picking the Right LG Filter

Q: Can an LT1000P replace an LT700P?

Not directly. They have different shapes and mounting points, so an LT1000P will not fit a refrigerator built for the LT700P. They are generation-specific, so match the filter to your model year or to the shape of the cartridge currently installed.

Q: Is the LT1000P better than the LT700P?

It is certified more broadly, adding NSF/ANSI 401 for trace pharmaceuticals to the shared 42 and 53 claims. Both share a 200-gallon, six-month rating. The main advantage is that extra certification scope, usable only if your fridge is designed for the LT1000P.

Updated July 2026 · ClearTap editorial · LG refrigerators

LG LT1000P vs LT700P Water Filter: Fit, Life & the Air-Filter Mix-Up — Filter Cartridges

Your LG dispenser is nagging about a filter, so you search "LG water filter" and get handed a LT700P, a LT1000P, a LT1000PC, a LT120F, and a wall of ADQ part numbers that look like license plates. One of those isn't even a water filter. Buy the wrong shape and it won't lock into the housing; buy the wrong bundle and you'll pay for an air filter you didn't need.

Short answer: The LT700P is the round push-in cartridge for older LG (and Kenmore) refrigerators, roughly 2010–2017. The LT1000P is the newer, differently shaped cartridge for 2017-and-later LG French-door models. Both are rated 6 months / 200 gallons, but they are not interchangeable — different mount, different socket. The LT1000P adds NSF/ANSI 401 certification the LT700P lacks. Genuine runs $35–50. And the LT120F you keep seeing? That's the air filter, a separate part entirely.

Reviewed by the ClearTap editorial team. We publish plain specs, model compatibility and NSF/EPA-based standards so you can judge for yourself — no lab-test theatre and no upsell. We do not run a water lab; our guidance is built from published specifications and NSF/EPA standards, not invented tests. General information about water quality only, not medical or drinking-water advice: for legal or health decisions about your water, test it with a certified laboratory.

The generation rule

LG split its filters cleanly by era. The LT700P (part ADQ36006101) is a cylindrical cartridge that pushes into the upper-right corner of the fresh-food compartment on the older lineup — many 2010-to-2017 French-door and side-by-side units, plus a stack of Kenmore models built by LG. The LT1000P (part ADQ74793501) is a taller, keyed cartridge for the redesigned 2017-onward French-door refrigerators, mounted in the upper-left interior. If your LG is recent, you're almost certainly on the LT1000P; if it predates 2017, look first at the LT700P.

Side by side

	LT700P	LT1000P
LG part number	ADQ36006101 / -102	ADQ74793501
Era	~2010–2017	2017 and newer
Shape / mount	Round, push-in, upper-right	Keyed, upper-left interior
Rated life	6 mo / 200 gal	6 mo / 200 gal
Certifications	NSF 42/53	NSF 42/53/401
Combo/bundle names	—	LT1000PC, LT1000PCS (with air filter)

The meaningful spec gap is certification: the LT1000P is validated to NSF/ANSI 401, which covers trace pharmaceuticals and emerging contaminants, on top of the chlorine-taste (42) and lead/cyst (53) claims both filters share. If that scope matters to you and you own an older fridge, note that you can't simply upgrade — the LT1000P won't fit an LT700P housing.

The air-filter mix-up that costs people money

Here's the trap in LG's naming. Many LG French-door refrigerators use two separate filters: a water cartridge (LT700P or LT1000P) and a small fresh air filter, the LT120F, that sits in a round housing on the interior wall and deodorizes the compartment. They do unrelated jobs. The LT120F does nothing for your drinking water; the water cartridge does nothing for fridge odor.

The bundle names blur this on purpose. LT1000PC and LT1000PCS are combo packs that include both the LT1000P water filter and one or more LT120F air filters. Buy the combo if you actually want both; buy the plain LT1000P if your water is all you're replacing. People routinely overpay for air filters they didn't know were in the box.

What's verifiable here, and what isn't: We can't run a reduction assay on an LT1000P versus an LT700P — the contaminant claims above are read directly from LG's NSF listings, which are the auditable source for what each filter removes. What you can confirm yourself is fitment and bundle contents: pull your current cartridge to see its shape and part number, and read the pack to see whether an LT120F air filter is riding along. The certification is LG's to prove; the fit is yours to check.

How often to swap it

Six months or 200 gallons is the rating for both, and as always the gallons govern. A household leaning on the dispenser and ice maker daily can drain 200 gallons in four to five months; a light user rides past six. The tells are consistent across LG models: dispenser output drops from a steady stream to a weak flow, chlorine or a flat taste returns, or ice starts looking cloudy. LG's door indicator is a calendar countdown, so treat it as a reminder and let flow and taste make the final call.

Aftermarket LT1000P and LT700P filters

Third-party versions of both are everywhere at $12–20 against the genuine $35–50. Physical fit on the popular LG sizes is usually reliable. The real variable is what's inside and whether it's certified. A generic that carries independent NSF/ANSI 42 and 53 test listings is a defensible buy; one that only says "fits LG LT1000P" with no certification is telling you about the plug and staying silent about the filtration. If the LT1000P's NSF 401 claim was your reason for buying, a non-certified generic quietly drops it.

Common mistakes

Ordering across generations. An LT1000P won't seat in an LT700P fridge and vice versa. Confirm your era or your current cartridge's shape first.
Paying for a combo you didn't want. LT1000PC and LT1000PCS include air filters. If you only need water filtration, buy the plain LT1000P.
Thinking the LT120F cleans your water. It's an air deodorizer. It has zero effect on what comes out of the dispenser.
Buying an uncertified generic for the 401 claim. If emerging-contaminant reduction was the point, an uncertified "compatible" filter doesn't deliver it.
Not flushing the new cartridge. Send a couple of gallons through first to wash out carbon dust before you drink or fill an ice tray.

FAQ

Can an LT1000P replace an LT700P?

Not directly — they have different shapes and mounting points, so an LT1000P won't fit a refrigerator built for the LT700P. They're generation-specific. Match the filter to your model year or, more reliably, to the shape of the cartridge currently installed.

What's the difference between LT1000P, LT1000PC and LT1000PCS?

The LT1000P is the water filter alone. LT1000PC and LT1000PCS are combo packs that add one or more LT120F fresh-air filters to the same water cartridge. Same water filtration in all three — the difference is whether air filters are bundled in.

Is the LT1000P better than the LT700P?

It's certified more broadly, adding NSF/ANSI 401 for trace pharmaceuticals to the shared 42 and 53 claims. Both share the same 200-gallon, six-month rating. "Better" mostly comes down to that extra certification scope, but you can only use the LT1000P if your fridge is designed for it.

How do I find my LG filter model?

Pull the installed cartridge and read the ADQ part number or LT code on it, or look up your refrigerator's model number on LG's site. Shape is a fast tell: a round push-in in the upper-right corner is an LT700P; a keyed cartridge in the upper-left points to an LT1000P.

Related:

General information based on manufacturer specifications and NSF/ANSI standards, not independent lab testing or medical advice. Filter performance and pricing vary by model, water quality and region. For health or legal decisions about your water, test it through a state-certified laboratory.