LG Refrigerator Water Filter Replacement: Match Your Model Before You Buy

You pull the old cartridge from your LG fridge and the label is faded. Getting your LG refrigerator water filter replacement right the first time saves you a return, a wasted order, and weeks of drinking unfiltered water while you sort it out.

The right replacement is the filter number printed on your current cartridge or listed for your exact refrigerator model: LT700P, LT1000P, LT500P, LT600P, or LT800P, never a look-alike. LG uses several different cartridges, and they sit in different spots with different locking styles. A filter that fits one French door model can fail to seat in the next one.

Once you know your number, the next choice is price and proof. Genuine LG filters cost more, and compatible filters cost less, but their certification claims differ from product to product. You will be able to confirm your filter, compare real prices, and check contaminant claims before you spend a dollar.

How to Confirm LG Refrigerator Water Filter Replacement Compatibility

You confirm compatibility by matching two things: your refrigerator’s full model number and the part number on the cartridge you already have. When both point to the same filter, you can order with confidence. When they disagree, trust the model number and ask for help before buying.

Find the Refrigerator Model Number and Current Cartridge Label

Your model number lives on a sticker inside the fresh food section, most often on a side wall near the top or close to the door hinge. It also appears in your owner’s manual. LG model numbers are long, such as LFXS28968S or LRFVS3006S, so copy every letter and number.

Next, look at the old cartridge itself. The filter number (for example, LT1000P) is printed on the label. You may also see a longer part number such as ADQ74793501, which is the part number for the LT1000P.

Keep these details together before you shop:

• The full refrigerator model number, including the last letters, which often mark the finish color
• The filter name on the cartridge, such as LT700P or LT800P
• Any long part number on the label, like ADQ36006101
• Where the filter sits in your fridge, such as the back left corner or behind a door bin

If the label is worn off, a filter cross-reference tool lets you search by an old part number or brand code instead.

Check the Replacement Listing Against Your Exact Model

A listing is only useful if your model number appears on it. Scan the compatibility list for your exact model, letter for letter. A list that says “fits most LG French door models” does not count as proof.

Watch for small differences. Two models can share the same first eight characters and still use different filters, especially across model years. If your model is missing from the list, ask the seller to match your model number before you order.

Which LG Filter Number Does Your Refrigerator Use?

Most LG refrigerators with water dispensers use one of five cartridges: LT700P, LT1000P, LT500P, LT600P, or LT800P. LG also lists the LT900X3 for certain models. Each one has its own shape, and the filter location changes with it, so the spot where your old filter sits is a strong clue.

LT700P vs. LT1000P: Match the Filter to the Refrigerator Model

The LT700P and LT1000P are two of the most common LG cartridges, and people mix them up often. They are separate parts. Buy only the one your model lists.

The LT700P sits in a housing on the far back left of the fresh food section. Its genuine part numbers include ADQ36006101 and AGF80300702.

The LT1000P (part number ADQ74793501, also sold as LT1000PC) usually sits behind the bottom door bin. Models that list the LT1000P include:

• LFXS28968S and LFXS26973D French door models
• LRFVS3006S and LRFDS3006D models
• LMXS28626D and LMXS30796S models
• LRMVS3006-style InstaView models only when your exact model is listed

One detail causes confusion. LG’s water filter replacement guide notes that some LT1000P models use the same removal method as the LT700P. A matching release style does not make the cartridges interchangeable, so go by the filter number, not the housing.

Other Filter Numbers to Check: LT500P, LT600P, and LT800P

The LT500P (part number 5231JA2002A) sits near the top of the fresh food section, behind the lamp cover. It fits older LG models and some Kenmore refrigerators.

The LT600P (part number 5231JA2006A) is an older interior cartridge. Like the LT500P, it also appears in some Kenmore refrigerators.

The LT800P usually sits behind the bottom door bin, although some models house it the way they house the LT700P. Because the LT800P and LT1000P share a location on many fridges, check the cartridge label closely before you order.

Genuine LG or Compatible: Which Should You Buy?

Buy genuine LG if you want the exact part your fridge shipped with and the claims LG publishes for it. Choose a compatible filter if lower cost is the priority and the product lists your model and shows its own certifications. Both can be sound choices; the trade-off is price against proof you have to check yourself.

Genuine LG filters are built to LG’s specs, so fit is predictable. Compatible filters vary more by maker, and a poor one can leak, fit loosely, or reduce fewer contaminants. A good one can do the job for less money.

Compare Prices for Filters That Fit Your Model

The gap is real. In September 2026, LG’s list price for the genuine LG LT700P was $54.99 for one filter, or $39.99 per filter with its subscription.

Here is what LG filters cost from discount sellers in September 2026, by pack size:

• LT1000P (ADQ74793501): from $29.99 for one filter, or $55.99 for a two-pack
• LT700P (ADQ36006101): from $28.99 for one filter, or $94.99 for a four-pack
• LT800P (ADQ73613401): from $30.00 for one filter
• LT600P genuine OEM (5231JA2006A): $42.99 for one filter
• LT500P genuine OEM (5231JA2002A): $39.99 for one filter

Compare the per-filter price, not only the sticker price. Shipping changes the math too, since some sellers charge for it and others include it.

Check Each Filter’s NSF or WQA Listing and Contaminant Claims

Look for the exact standard and the exact contaminants on each product. NSF International (NSF) standards cover different things: NSF/ANSI 42 covers taste, odor, and chlorine, NSF/ANSI 53 covers health concerns such as lead, and NSF/ANSI 401 covers some emerging contaminants.

LG lists the LT700P as certified to NSF 42 and NSF 53. The LT1000P carries its own claim list, so check it separately. Two filters with “NSF” on the box can still reduce different contaminants.

The Water Quality Association (WQA) is a separate group with its own Gold Seal program. A WQA seal and an NSF certification are not the same thing, and neither covers every contaminant. Look up the specific model number in the certifier’s listing to see what it was tested for.

Before You Order: Pack Size, Cost, and Timing

Before you check out, confirm the pack size, the real cost per filter, and when you will need the next one. These three checks keep you from overpaying or running out.

Compare Single-Filter and Multipack Costs

Multipacks lower your cost per filter. Using September 2026 discount prices for the LT700P, one filter costs $28.99, while a four-pack at $94.99 works out to about $23.75 each. That is roughly $5 saved per filter.

Buy a multipack only if you are sure of your filter number. Four wrong filters is a bigger problem than one.

If you manage more than one fridge, such as a rental or a second kitchen, list every filter you need first. Other brands use very different cartridges, and some Kenmore refrigerators use LG-made filters.

Plan for Replacement About Every Six Months

LG recommends replacing your water filter about every six months. The LT700P and LT1000P are both rated for 6 months or 200 gallons, whichever comes first. Busy households can hit 200 gallons sooner.

Change it early if water flow slows, the taste or smell shifts, or the filter light turns on. A two-pack covers a full year, and a four-pack covers two years for one fridge.

Keep spare filters sealed in their packaging until you use them. For more on why regular changes pay off, see these refrigerator water filter benefits, or browse the filter care blog for brand-specific tips.

Choose the Cartridge That Matches Your Fridge and Priorities

The right LG refrigerator water filter replacement is the one your exact model number lists, confirmed by the label on the cartridge you already have. Once that match is settled, the choice between genuine and compatible comes down to price and the specific certifications printed for that product.

A useful habit: write your filter number and model number on a piece of tape inside the fridge, near the filter. Next time, you skip the search and go straight to ordering. If lead is a concern in your home, pick a filter whose listing names lead reduction under NSF/ANSI 53, not just chlorine taste.

When you are ready, find your filter with the cross-reference filter tool at FilterForFridge.com, with free shipping in the lower 48 states. Not sure of your number? Email your refrigerator model number to contact@filterforfridge.com, and the team will match you to the right certified filter.

Frequently Asked Questions

Can I Use an LT1000P Instead of an LT700P?

No, use the filter your refrigerator model lists. The LT1000P and LT700P are different cartridges, even though some LT1000P models share a similar release style. Forcing the wrong one can cause leaks or leave water unfiltered.

How Can I Check Whether a Compatible LG Filter Is Certified to Reduce Lead?

Look for lead reduction listed under NSF/ANSI 53 for that exact product model, then search the model in the certifier’s database. The Environmental Protection Agency offers a consumer tool for filters certified to reduce lead that explains what to look for. A general “NSF certified” label without lead named does not prove lead reduction.

Can I Change My LG Water Filter Without Turning Off the Water?

Some LG models allow it, but LG’s standard steps start by closing the water supply valve. Check your owner’s manual first. Either way, keep a towel or cup under the filter to catch drips.

How Do I Reset the LG Filter Light After a Change?

On many LG models, you press and hold the Water Filter or Filter Reset button for 3 seconds until you hear a chime or the light turns off. Button names and menus vary by model, and smart models may use the app. Flush the new filter first, since LG suggests about 2.5 gallons for many models.

Is an LG Refrigerator Air Filter the Same as a Water Filter?

No, they are separate parts with separate jobs. The water filter cleans water for your dispenser and ice maker, while the air filter, such as the LG LT120F, reduces odors inside the fridge. Order each one by its own part number.