Water Filter for the LG LMXS30776D (LT800P)

LMXS30776D specifics — where the filter actually lives

Where the filter actually lives: inside the fresh-food cavity, position varying with dispenser spec, a deliberate placement that keeps the swap away from the door seals and drawer rails. It is a push-twist bay — the short locking turn after the press is what keeps the seal honest between changes.

Before you click buy, two things: a stiff first removal on builds that sat on the same cartridge for years, and an indicator light that wants a manual reset after a non-OEM cartridge is seated. LM is not a trim code, it is a chassis statement: LM is LG’s own coding for 4-door Max machines, and in that format the water path is long enough that a neglected cartridge shows up as flow drop before it shows up as taste. The 6D ending is a finish code — color and handle options, not mechanical ones. Every finish of this chassis takes the same cartridge.

LM vs LF — what the prefix tells you

LM or LF: the badge difference that does (and does not) change the filter order. 4-door Max on the LM side, French-door on the LF side — the parts catalog runs the same cartridge across both. cabinet class 30 cu ft — a box that size leans on the dispenser, so the six-month cartridge interval earns its keep.

Swap it in 5 minutes

• Press the release (if fitted), twist the old cartridge free, and pull it from the header.
• Wet the new cartridge’s o-ring with cold tap water so it seats without dragging.
• Push the cartridge square onto the header, then give it the locking quarter turn.
• Run two gallons through the dispenser to flush carbon fines, then hold the filter-reset control until the status light clears.

What this filter takes out of your water

Coverage above lists what the standard addresses, not a performance claim for any specific cartridge — removal claims vary by certificate, so check the NSF listing for the exact part number you are buying.

LMXS30776D filter questions