Water Filter for the LG LFX31925ST08 (LT700P)

LFX31925ST08 specifics — where the filter actually lives

Where the filter actually lives: in the fresh-food compartment, typically the upper back wall in most French-door layouts — usually a kneeling-height or shoulder-height swap, not a teardown. It is a push-twist bay — the cartridge goes in square, then a short rotation locks it against the header — no tools involved.

Two quirks worth knowing before you order: expect dribble at the bay on removal even with the supply off, and remember the indicator will not self-clear — hold the reset control. One prefix, one chassis family: LF is LG’s French-door designation proper, and the service literature files every one of these under the same cartridge line. The two-digit 08 tail is revision bookkeeping. Badge position and shelf trim moved around; the bay geometry did not.

LF vs LS — what the prefix tells you

Two prefixes, two missions: LF covers French-door, while LS covers side-by-side. The cartridge line is usually shared across both — order by chassis, not by door count. call it a 31 cubic feet box — which is why this cartridge works for a living rather than sitting decorative.

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.

LFX31925ST08 filter questions