Water Filter for the LG LMXS30776 (LT800P)

LMXS30776 specifics — where the filter actually lives

Where the filter actually lives: in the fresh-food compartment — exact spot varies by dispenser layout — usually a kneeling-height or shoulder-height swap, not a teardown. This is a push-twist style bay: two motions, one orientation, five minutes including the cleanup.

Practical notes from the install forums: plan on a towel for the first pull — sitting water in the line — and a five-second reset hold once the fresh cartridge is in. The LM prefix is the tell: LG built these as 4-door Max machines, and the filter bay inherits the geometry that implies, including where the dispenser feed runs. That trailing 76 is the revision counter: LM chassis revisions share one water path, so the cartridge order never changes with it.

LM vs LF — what the prefix tells you

Prefix families here: LM against LF. The door count differs — 4-door Max against French-door — but the bay and the cartridge order do not. the 30 cubic feet figure in the code is the household size proxy; larger households breach the rated gallons before the calendar does.

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.

LMXS30776 filter questions