Buying Guides
LG LT800P Replacement Water Filter: Fits, Part Numbers & the Affordable Compatible Option
The LG LT800P (part number ADQ73613401) is the filter behind the dispenser in a huge range of LG French-door and side-by-side refrigerators sold over the last decade. When the filter light comes on, you don't need the dealer part — you need a filter that meets the spec.
Part numbers it replaces
Interchangeable part numbers
- LG LT800P, LT800P1, LT800P2, LT800P3
- LG ADQ73613401
If the label on your current cartridge shows any of these, the compatible filter drops straight in. Full model list is on the product page.
Why homeowners switch to compatible filters
Refrigerator filters are a twice-a-year purchase for the life of the appliance — the OEM markup adds up fast. The Waterdrop LT800P-compatible cartridge we stock uses a coconut-shell activated carbon block to reduce chlorine taste and odor, seals into the OEM housing, and costs far less per swap. Check it out in The DIY Shop.
Replacement in under a minute
- Find the filter housing inside the fresh-food compartment (upper left on most models).
- Rotate the old cartridge counterclockwise a quarter turn and pull down.
- Push the new cartridge in and rotate clockwise until it stops.
- Flush 2–3 gallons through the dispenser before drinking.
- Reset the filter indicator (hold the reset/filter button ~3 seconds).
Never buy this filter at the last minute again
The LT800P should be replaced about every six months. On our product page you can choose Auto-Ship — pick a 3, 6, or 12-month schedule and a fresh filter shows up at your door right when it's due. Same price as one-time purchase, cancel anytime, and your ice never develops that end-of-filter taste.
A note for Florida homes
Most Tampa Bay area utilities disinfect with chlorine or chloramine, and that taste goes straight into your ice and drinking water when a fridge filter is past its prime. If the water tastes off even with a fresh filter, the issue is usually what's coming into the house — not the fridge. We'll test it for free: book a free in-home water test and we'll show you exactly what's in your tap water.
LG®, GE®, Amana®, Electrolux®, Frigidaire®, Kenmore® and all model numbers referenced are trademarks of their respective owners, used here for compatibility identification only. Waterdrop and iSpring replacement filters are independently manufactured compatible filters and are not affiliated with or endorsed by the appliance manufacturers.