Water Filter for the LG LSC21935SB (LT500P)

LSC21935SB specifics — where the filter actually lives

On the LSC21935SB, the cartridge at the base of the fresh-food compartment in most side-by-side builds — grille or lower rear, the same estate every side-by-side refrigerator in this family uses. The seat combines push-fit and twist-lock: two motions, one orientation, five minutes including the cleanup.

Field notes: 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. Decode the plate and the parts question answers itself: LG built these as side-by-side machines, and the filter bay inherits the geometry that implies, including where the dispenser feed runs. That SB suffix is trim-level shorthand. LG kept the LT500P bay common to every finish in the line.

LS vs LF — what the prefix tells you

Same parts shelf, two cabinet missions — LS machines are side-by-side; LF machines are French-door. Both draw from the same cartridge line, which is why fit charts list them together. Cabinet decode: 21 cubic feet — the number that tells you whether this cartridge feeds a family-size dispenser or a compact one.

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.

LSC21935SB filter questions