LG produces refrigerators across multiple series and generations and the water filter your unit requires depends entirely on the model you own. If you are looking at filter codes like LT1000P, LT800P, LT700P, LT600P, or LT500P and are not completely sure which one applies to your refrigerator, this guide will walk you through exactly how to identify the correct replacement before buying so you can order with confidence and avoid a costly mismatch.
Why LG Water Filter Codes Can Be Confusing
LG has produced refrigerators across a wide range of series and generations and different configurations use different filter codes and housing designs. Here is why buyers frequently run into confusion:
- Five different LG filter codes cover different model generations and all use twist-in designs, making it impossible to tell them apart by installation type alone
- The LT1000P and LT800P are the two most commonly confused codes because they cover consecutive LG refrigerator generations and look nearly identical but have different housing tolerances that prevent cross-code substitution
- Alternative part numbers like ADQ36006101 and MDJ64844601 appear in listings alongside primary filter codes making it unclear which code is the primary replacement for a specific refrigerator model
- LG refrigerator model numbers change frequently across series and buyers who own an older LG model may find their unit requires the LT600P or LT500P rather than the more commonly listed LT1000P or LT800P
- Some listings group multiple LG filter codes together making it difficult to determine which code actually applies to your specific unit
- The LG air filter and water filter are both replaced on a schedule and buyers replacing both at the same time sometimes confuse the two part numbers when ordering
Where to Find Your LG Refrigerator Filter Code Before Buying
- Check the label on your current filter — the part number is printed directly on it. This is the fastest and most reliable confirmation
- Look inside the filter housing slot — some LG models print the required filter code on a label inside the housing slot itself
- Find the model plate inside the fridge — typically located along the upper door frame or side wall of the fresh food compartment. Use the model number to cross-reference the correct filter code
- Check your user guide — the maintenance section lists the exact replacement filter code for your specific LG refrigerator model
- Search by model number on the retailer page — if the label is worn or unreadable this is the quickest way to confirm the right filter before you buy
What Is the LG LT1000P Water Filter?
The LG LT1000P is an NSF 42 and 53 certified replacement water filter designed for newer generation LG French door and side-by-side refrigerator models. It uses activated carbon block filtration to reduce chlorine taste and odor, lead, heavy metals, and VOCs before water reaches the dispenser or ice maker. The LT1000P has a service life of 200 gallons or 6 months whichever comes first and uses a twist-in installation design that requires no tools. It is one of the most widely used LG filter codes in current production models and covers a broad range of newer LG refrigerator configurations.
What Is the LG LT800P Water Filter?
The LG LT800P is also an NSF 42 and 53 certified activated carbon block replacement water filter but is designed for an earlier generation of LG French door and side-by-side refrigerator models. It carries the same service life as the LT1000P and uses the same twist-in installation design, but the housing tolerances are specific to LT800P compatible models and are not interchangeable with the LT1000P. Alternative part numbers ADQ73613401, ADQ73613402, and MDJ64844601 refer to the same LT800P filter format.
What Is the LG LT700P Water Filter?
The LG LT700P is an NSF 42 and 53 certified replacement water filter covering a different range of compatible LG refrigerator models with its own distinct housing design. Like the LT1000P and LT800P it uses a twist-in installation design and has a service life of 200 gallons or 6 months, but the LT700P housing is not interchangeable with either of those filter codes. Alternative part numbers ADQ36006101 and ADQ36006102 refer to the same LT700P filter format and commonly appear on older filter labels.
What Is the LG LT600P Water Filter?
The LG LT600P is an NSF 42 and 53 certified replacement water filter designed for a specific range of LG refrigerator models that use the LT600P housing format. It uses a twist-in installation design and has the same service life of 200 gallons or 6 months as other LG filters in this collection. The LT600P covers an older range of LG refrigerator configurations and buyers who own an LG refrigerator from an earlier production period should check whether the LT600P rather than the LT800P or LT1000P is the correct replacement for their unit.
What Is the LG LT500P Water Filter?
The LG LT500P is an NSF 42 and 53 certified replacement water filter designed for classic LG refrigerator models that use the LT500P housing format. It is the oldest filter code in the LG range covered on this page and is designed for LG refrigerator configurations that predate the LT600P and LT700P generations. Like all other LG filters in this collection it uses a twist-in installation design and has a service life of 200 gallons or 6 months whichever comes first.
Is the LG LT1000P the Same as the LT800P?
No. This is the most common question buyers ask when searching for an LG refrigerator water filter. While the LT1000P and LT800P are both NSF 42 and 53 certified activated carbon block filters with the same service life and the same twist-in installation design, they are separate part numbers with different housing tolerances built for different LG refrigerator model generations. Ordering the LT1000P for a refrigerator that requires the LT800P will result in a filter that either does not seat properly or leaves gaps at the housing connection that allow unfiltered water to bypass the filter entirely. The same applies to any cross-code substitution across all five LG filter codes covered on this page.
Compatibility Checklist Before You Buy an LG Water Filter
- Your current filter label shows LT1000P or ADQ747935 — the LT1000P is the confirmed replacement
- Your current filter label shows LT800P, ADQ73613401, ADQ73613402, or MDJ64844601 — the LT800P is the confirmed replacement
- Your current filter label shows LT700P, ADQ36006101, or ADQ36006102 — the LT700P is the confirmed replacement
- Your current filter label shows LT600P — the LT600P is the confirmed replacement
- Your current filter label shows LT500P — the LT500P is the confirmed replacement
- Your refrigerator model appears on the compatibility list for your chosen filter — cross-check before ordering
- It has been 6 months or 200 gallons since your last replacement — if yes it is time to order regardless of water taste or flow
Common Mistakes When Buying an LG Refrigerator Water Filter
- Assuming the LT1000P fits all newer LG refrigerators — the LT1000P covers a specific range of newer LG models. Refrigerators that use the LT800P or LT700P will not accept the LT1000P even if they are relatively recent models
- Ordering based on appearance rather than part number — all five LG filter codes use twist-in designs and look similar. Housing tolerances differ between codes making cross-code substitution unreliable
- Confusing the water filter part number with the air filter part number — both the LT120F air filter and the water filter codes follow a similar LT naming convention which leads some buyers to mix up the two when ordering
- Ignoring alternative part numbers on older filter labels — codes like ADQ36006101 or MDJ64844601 are valid alternative part numbers for current LG filters. If your label shows one of these codes, use the primary filter code listed on this page to find and order the correct replacement
- Skipping the post-installation flush — always run 2 to 3 gallons through the dispenser after installing a new filter to clear carbon fines before drinking
- Forgetting to reset the filter indicator — an unreset indicator will trigger a false early replacement reminder even when the new filter is performing correctly
When Should You Order a Replacement LG Water Filter?
- 6 months have passed since the last replacement — the primary trigger for all LG water filters regardless of gallon count
- 200 gallons have passed — replace at this threshold if your household reaches it before the 6 month mark
- Water tastes flat or slightly chemical — the carbon block is no longer reducing chlorine and contaminants at full capacity
- Ice has a chlorine or off taste — a reliable sign the filter is past its effective odor and contaminant reduction life
- Water flow from the dispenser has slowed noticeably — a saturated filter restricts flow through the housing
- The filter indicator light has activated — order a replacement promptly rather than waiting for additional signs of reduced performance
Ready to Shop LG Refrigerator Water Filters?
If you have confirmed the correct filter code for your LG refrigerator you can view the compatible replacement and order here. Replacing on schedule ensures your refrigerator delivers consistently clean, great-tasting water and ice through every cycle.
Shop LG Water Filters from purefridgewater.
Frequently Asked Questions
How do I know if my LG refrigerator needs the LT1000P or the LT800P?
Check the part number on the existing filter installed in your refrigerator. If it shows LT1000P, that is the confirmed replacement. If it shows LT800P or any of its alternative codes, the LT800P is the correct replacement. Never substitute one for the other.
What do the alternative part numbers like ADQ36006101 mean on my LG filter?
These are older or alternative part numbers that refer to the same current filter formats. ADQ36006101 and ADQ36006102 refer to the LT700P while ADQ73613401 and MDJ64844601 refer to the LT800P. If your label shows any of these codes, use the primary filter code on this page to find the correct replacement.
Do I need to turn off the water supply before replacing an LG water filter?
Most LG filter housings are designed for a straightforward twist-in swap without shutting off the water supply. Some minor dripping at the housing during the swap is normal. Consult the LG user guide for your specific model if you are unsure.
Can I keep using my LG refrigerator if the filter replacement is overdue?
The refrigerator will continue to dispense water but the filter will no longer be reducing lead, chlorine, and VOCs at its rated capacity. A filter past its service life may also begin releasing previously captured contaminants back into the water. Replacing on schedule is the most reliable way to maintain safe, clean water.
Is the LG LT120F air filter the same as the water filter?
No. The LT120F is an air filter that reduces odors inside the refrigerator compartment. The water filters covered on this page reduce contaminants in dispensed water and ice. They are completely different products with different part numbers, different housing designs, and different functions.
Where can I find more detail on each LG water filter before deciding which to buy?
Each filter has its own dedicated landing page on PureFridgeWater covering full specifications, compatible models, installation steps, and a comparison with related filters to help you confirm the correct replacement before ordering.