Water Filter for the LG APF1400 (LT700P)

APF1400 specifics — where the filter actually lives

The APF1400 carries its water filter in the fresh-food compartment, placement dependent on the dispenser package, the same estate every refrigerator in this family uses. Mechanically it is a push-and-twist seat: press, quarter-turn, finished — the two-step seat keeps the o-ring from dragging on installation.

Two quirks worth knowing before you order: run the first gallon or two through a fresh cartridge before drinking — carbon fines are normal — and reset the indicator so the countdown matches reality. 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

The digits in the model number read as cabinet capacity (14 cu ft), a decent proxy for how hard the filter works in daily service. The stable part of the APF1400 story is the water path: the water path is fixed at the LT700P line — that asymmetry is what makes filter shopping simple.

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