Water Filter for the LG APF1400 (LT700P)

APF1400 specifics — where the filter actually lives

Finding the bay is the easy part — this chassis puts it in the fresh-food compartment, placement dependent on the dispenser package — usually a kneeling-height or shoulder-height swap, not a teardown. Mechanically it is a push-and-twist seat: seat the cartridge, give it the quarter turn, and the bay takes it from there.

Order-day practicalities: a first removal that fights a set o-ring, and a status light that needs a manual hold-to-reset before it acknowledges the new cartridge. The constant across every trim of this machine is the cartridge line — the APF1400 shares its water path with the whole LT700P generation — the cartridge is the common denominator, not the door count. Suffix 00 = production revision; filtration hardware was not part of the revision cycle.

Reading the APF1400 model code — what the digits tell you

Read the code as 14 cu ft of capacity, which tells you the cartridge’s real workload between changes. Hold this constant while shopping: the LT700P cartridge is the one constant across the model run.

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.

APF1400 filter questions