The LT500P is the longest-lasting filter LG ever built for its classic side-by-side refrigerators — 500 gallons, the highest rating in the entire LG lineup. That high capacity is exactly what trips buyers up: people assume "biggest" means "fits everything," and order it for a fridge that actually needs a newer code. This guide keeps it practical: confirm the LT500P is your filter before you spend a cent.
Start here: read the part number off your old filter
The single most reliable check takes ten seconds. Pull the current filter and read the label. If it says LT500P, 5231JA2002A, ADQ72910901, or LT500PC, you're done — those are all the same filter, and the LT500P is your replacement. If the label is faded, find the model plate inside the fresh-food compartment (upper door frame or side wall) and cross-reference that model number instead.
Who the LT500P is actually for
The LT500P fits LG's earlier-generation classic side-by-side models — the ones that came before the LT600P and LT700P series existed. NSF 42 and 53 certified, activated carbon block, twist-in, no tools. It reduces chlorine taste and odor, lead, heavy metals, and VOCs, and runs up to 6 months or 500 gallons, whichever comes first.
The capacity trap (don't fall for it)
Higher gallons does not mean broader fit. The LT500P's 500-gallon rating describes how long it lasts, not how many fridges it fits. A newer LG model that calls for the LT600P (300 gal) or LT700P (200 gal) will not seat the LT500P correctly — and a poor seal lets unfiltered water bypass the filter entirely. Always match the part number, never the capacity.
Quick "is it the LT500P?" test
- Old filter reads LT500P / 5231JA2002A / ADQ72910901 / LT500PC → yes
- Fridge is an older/classic LG side-by-side → likely yes
- Old filter reads LT600P, LT700P, LT800P, or LT1000P → no, order that code instead
- Connection is twist-in → consistent with the LT500P
After it's installed
Flush 2–3 gallons through the dispenser to clear carbon fines before drinking, then reset the filter indicator so you don't get a false early reminder. Re-order when 6 months pass, or at 500 gallons, or when water and ice start tasting flat or chlorinated.
Ready to order?
If your LG uses the LT500P, view the compatible replacement and confirm availability here: Shop LG LT500P at purefridgewater.
FAQs
Is 5231JA2002A a different filter? No — it's just the old part number for the LT500P. Same filter.
My fridge uses the LT500P — can I drop in an LT600P? No. Different housing tolerances; they don't interchange.
Does the 500-gallon rating mean it fits more models? No. Capacity equals lifespan, not compatibility.