ExactFilterFit CALIPER & RFID SPEC DB
← Back to Master Cross-Reference Directory • Category: Fridge Water Filter RFID Cross-Reference • Nominal Spec: LG LT1000P (1.97" OD x 6.90" H)
Fridge Water Filter RFID Cross-Reference

LG LT1000P vs. LT1000PC / MDJ64844601 Fridge Filter Exact Keyway & NSF Alternatives

LG LT1000P, LT1000PC and LT1000PCS (MDJ64844601) are the same twist-in cartridge (≈1.97" OD x 6.90" body) — the suffix only reflects packaging/revision. Leaks and 'won't lock' issues come from misaligned quarter-turn lugs or a dry O-ring, not size differences. LT1000P fridges have no RFID lockout.

⚠ CRITICAL COMPATIBILITY RULE: Any LT1000P/PC/PCS-compatible cartridge fits; push up fully and rotate 1/4 turn until the lugs click. Waterdrop and Swift Green both ship verified LT1000P equivalents.
Verified Reddit Fit Complaint: r/Appliances — 'LG LT1000P leaking or won't twist lock into door housing'

Side-by-Side Exact Caliper & RFID Compatibility Matrix

Measured to 1/8" (0.125") Tolerance
OEM Brand & Model Exact Caliper Size (In) MERV / NSF Cert Slot Fit / RFID Chip Status OEM Price Verified Multi-Pack Match Direct Spec Links
LG OEM LT1000P / LT1000PC / LT1000PCS (MDJ64844601)
Group: LG top-left compartment (LRMVS, LRFVS, LMXS)
 1.97" OD x 6.90" body
1-31/32" x 6-29/32"
 NSF/ANSI 42, 53, 401 No RFID — quarter-turn dual-lug keyway $54.99 (1-Pack) OEM benchmark
$54.99 Save —
Verify Exact Fit → Amazon
Waterdrop LT1000P Replacement
Group: LG LT1000P family
 1.97" OD x 6.90" body
1-31/32" x 6-29/32"
 NSF/ANSI 42, 53, 401, 372 Matching dual-lug keyway, no chip needed $54.99 Waterdrop LT1000P (8% partner link)
$32.99 Save 40%
Verify Exact Fit → Amazon
Swift Green SGF-LT1000P Rx (Made in USA)
Group: LG LT1000P family
 1.97" OD x 6.90" body
1-31/32" x 6-29/32"
 Pharmaceutical + VOC reduction (Rx) Matching keyway, no chip $54.99 Swift Green SGF-LT1000P Rx
$30.60 Save 44%
Verify Exact Fit → Amazon
Swift Green SGF-LT1000P VOC
Group: LG LT1000P family
 1.97" OD x 6.90" body
1-31/32" x 6-29/32"
 VOC reduction Matching keyway, no chip $54.99 Swift Green SGF-LT1000P VOC
$27.54 Save 50%
Verify Exact Fit → Amazon
Frizzlife MS99 0.5-Micron Inline Fridge Filter (Bypass Kit)
Group: Any LG with bypass plug
 2.56" OD x 10.0" L, 1/4" quick-connect
2-9/16" x 10"
 NSF/ANSI 42 & 53 (lead, cysts) No cartridge keyway or chip — runs with factory bypass plug installed n/a Frizzlife MS99 Inline — use code GLOSSYKOALA for 10% off
$75.99 (≈$68.39 w/ GLOSSYKOALA) Save Lowest cost/gal
Verify Exact Fit → Amazon

Frequently Asked Fit & Bypass Questions

Q: What's the difference between LT1000P and LT1000PC?
None functionally — same part MDJ64844601; PC/PCS denote revised packaging.
Q: Why does my LT1000P leak after replacement?
The lugs weren't fully seated; remove, wet the O-rings, push up fully, rotate until it clicks.

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