The OEM cartridge is LG LT1000P. Compatible LT1000P filters can reduce cost, but compare exact certification and fit before ordering.
Correct filter for LFXS26973S
LG’s product specifications and builder documentation list LT1000P as the replacement water filter for this refrigerator.
OEM capacity baseline
LG markets LT1000P as a roughly six-month / 200-gallon cartridge, giving buyers a baseline for replacement planning.
Compatible replacements
LT1000P has a large aftermarket. The strongest alternatives document both refrigerator compatibility and their exact NSF certification scope.
Annual cost
At two replacements per year, cartridge price differences compound quickly.
How to verify fit before buying LG LFXS26973S Water Filter: LT1000P Replacement Guide
Treat compatibility as a model-number decision, not a shape-matching exercise. Start with the appliance or system model label, then confirm the exact cartridge or replacement code listed by the manufacturer. Similar-looking filters can use different tabs, seals, RFID features or bypass interfaces, so a cartridge that appears to fit can still leak, restrict flow or fail to lock correctly.
For aftermarket replacements, separate physical compatibility from filtration performance. A seller can correctly state that a cartridge fits a refrigerator while the contaminant-reduction scope differs from the original filter. If lead, cysts, PFAS or another health-related claim matters, verify the exact replacement model in the current certification or performance documentation rather than assuming an OEM-equivalent claim set.
Compare recurring cost, availability and replacement risk
Replacement products should be evaluated over several service cycles. Multiply the current cartridge price by the realistic replacement frequency, add shipping, and check whether the same model is consistently stocked. A low first-purchase price is less useful if the cartridge becomes difficult to source or if replacement intervals are short.
Watch for vague phrases such as “uses certified media” or “tested to a standard.” Finished-product certification is stronger evidence than a statement about one component. For marketplace listings, clear manufacturer identity, exact model numbers, return policies and traceable certification reduce the risk of counterfeit-style or poorly fitting replacements.