Cheapest NSF Certified Replacement for LG LT500P
The cheapest filter NSF lists for lead is the Water Specialist WS605B-A: $7.66 a filter on Amazon today, against $54.76 for LG's own LT500P. LG's own LT500P is listed for taste and odor only (NSF/ANSI 42), not for lead.
Check your old filter for the LT500P part number: 5231JA2002A (also sold as ADQ72910901).
3 filters, $7.66 each. NSF lists it for lead and cysts (NSF/ANSI 53). Rated 300 gallons, about 6 months.
Check price on AmazonAmazon prices as of November 12, 2026 at 12:18 PM ET. Prices can change; the price on Amazon is the one that counts.
Every LT500P replacement we checked
"Certified for" is what the certifier lists for that exact model code. Per filter = the pack price divided by the filters in the pack. Per year = 2 filters, because the filter is changed every 6 months.
| Filter | Certified for | Who certified it | Per filter | Per year | Per gallon | |
|---|---|---|---|---|---|---|
| Water Specialist WS605B-A Model WS605B-A · 3 filters | Lead and cysts | NSF 42, 53 | $7.66 | $15.33 | 2.6¢ | Amazon → |
| EcoAqua EFF-6005A Model EFF-6005A · 1 filter | Lead, cysts and mercury; traces of medicines | NSF 42, 53, 401 | $13.99 | $27.98 | 4.7¢ | Amazon → |
| Waterdrop Plus WDP-F05 Model WDP-F05 · 3 filters | Lead, cysts and mercury; traces of medicines | NSF 42, 53, 401 | $15.33 | $30.66 | 5.1¢ | Amazon → |
| ICEPURE PRO RWF0100AH Model RWF0100AH · 2 filters | Lead, cysts and mercury | NSF 42, 53 | $20.00 | $39.99 | 6.7¢ | Amazon → |
| PUREPLUS PP-RWF0100AH Model PP-RWF0100AH · 3 filters | Lead, cysts and mercury | NSF 42, 53 | $23.33 | $46.66 | 7.8¢ | Amazon → |
| Overbest OB6005 Model OB6005 · 3 filters | Taste and odor only | NSF 42 | $7.33 | $14.66 | 2.4¢ | Amazon → |
| Maxblue MB-F05 Model MB-F05 · 3 filters | Taste and odor only | NSF 42 | $8.33 | $16.66 | 2.8¢ | Amazon → |
| ICEPURE RWF0100A Model RWF0100A · 3 filters | Taste and odor only | NSF 42 | $9.00 | $17.99 | 3.0¢ | Amazon → |
| Waterdrop WD-F05 Model WD-F05 · 2 filters | Taste and odor only | NSF 42 | $9.59 | $19.18 | 3.2¢ | Amazon → |
| Mist CWMF045 Model CWMF045 · 3 filters | Taste and odor only | NSF 42 | $13.00 | $25.99 | 4.3¢ | Amazon → |
| LG LT500P (LG's own filter) Model LT500P · 1 filter | Taste and odor only | NSF 42 | $54.76 | $109.52 | 11.0¢ | Amazon → |
NSF 42 or NSF 53: which do you need?
NSF/ANSI 42 covers chlorine taste and odor. NSF/ANSI 53 covers health claims such as lead and cysts. NSF/ANSI 401 covers traces of medicines and a few other compounds. Each listing names an exact model code, so a brand can sell one filter listed for 42 and a look-alike listed for 53.
If you only want better tasting water, the taste-and-odor copies in the table are listed for the same job as LG's own LT500P and cost less. They are rated 300 gallons to LG's 500. If you want lead reduction, pick from the green rows. The cheapest of them costs about the same as the cheapest taste-only copy.
What NSF lists for LG's own LT500P
NSF's list for LG Electronics has the LT500P (also LT500PC and LT500PCS) at 500 gallons for NSF/ANSI 42, chlorine taste and odor. It carries a low-lead-content mark for its own parts. That mark is not lead removal. The LG filters NSF lists for lead are the LT600P and LT800P.
The LT500P is 5231JA2002A. ADQ73613401 is not the LT500P: NSF lists that number with the LT800P.
Waterdrop, Mist and Tier1 listings
Waterdrop WD-F05 is listed for NSF/ANSI 42 only. The Waterdrop Plus WDP-F05 is the one listed for 42, 53 and 401.
Mist CWMF045 is listed for NSF/ANSI 42 only. IAPMO R&T has a 42 certificate for Mist by Clearwater and no 53 certificate that we found.
NSF lists Tier1's RWF1050P for 42, 53 and 401. The Tier1 filter sold on Amazon for the LT500P is model RWF1050, a different code, so that listing does not cover it. The AQUA CREST 3-pack is the same case. For lead, buy the WS605B-A.
Which LG filter do I have?
LT500P, LT500PC and LT500PCS are the LG filter. Retailers list 5231JA2002A, ADQ72910901, ADQ72910911 and Kenmore 9890 (also 46-9890) as the same filter. The part number is printed on the old filter and in your fridge manual. LG's LT600P, LT700P, LT800P and LT1000P are different filters. Do not swap them in.
Common questions
What is the cheapest NSF certified replacement for the LG LT500P?
For lead, the Water Specialist WS605B-A 3-pack: NSF lists it for NSF/ANSI 53, and it has the lowest price per filter of the filters we found that NSF lists for lead. If you only need chlorine taste and odor (NSF/ANSI 42), Overbest OB6005 and Maxblue MB-F05 cost about the same.
Is the LG LT500P itself NSF certified?
Yes, for NSF/ANSI 42 only (chlorine, taste and odor), 500 gallons. NSF's LG Electronics listing (checked November 3, 2026) does not list it for lead. The LT600P and LT800P are the LG filters listed for lead.
Is NSF 42 or NSF 53 enough?
NSF/ANSI 42 covers taste and odor. NSF/ANSI 53 covers health claims such as lead and cysts. If you want lead reduction, buy a filter whose exact model code is listed under 53.
Is the Waterdrop WD-F05 certified for lead?
No. NSF lists WD-F05 for NSF/ANSI 42 only. The lead version is Waterdrop Plus WDP-F05, listed for 42, 53 and 401.
Is Mist certified for lead?
We found a taste-and-odor listing only. NSF lists Mist CWMF045 for NSF/ANSI 42, and IAPMO R&T lists Mist by Clearwater for NSF/ANSI 42. For lead, buy the WS605B-A.
Is ADQ73613401 the same as the LT500P?
No. NSF lists ADQ73613401 with the LG LT800P. The LT500P is 5231JA2002A (also sold as ADQ72910901 and ADQ72910911).
Is Tier1 certified for lead for the LT500P?
Not the one sold for it. NSF lists Tier1's RWF1050P for 42, 53 and 401, but the Tier1 filter sold on Amazon for the LT500P is model RWF1050, a different code. For lead, buy the WS605B-A.
How often should I change it?
LG rates the LT500P for 6 months or 500 gallons. The copies are rated 300 gallons, so a house that uses a lot of fridge water may change them sooner. Plan on 2 a year.
Sources
- NSF certified drinking water listings (info.nsf.org): LG Electronics Inc. LT500P / GEN11042FR-08 and ADQ73613401 (LT800P); Qingdao Ecopure Filter Co., Ltd. elements WS605B-A, EFF-6005A, WDP-F05, WD-F05, OB6005, MB-F05, TIER1-RWF1050P; Aquazon Solutions (PUREPLUS PP-RWF0100AH); TOP PURE (USA) and YUNDA H&H TECH (RWF0100AH); Mist CWMF045. Read November 3, 2026.
- IAPMO R&T listings searched for Mist (WP-10653, NSF/ANSI 42), Top Pure USA, Aquazon Solutions and Qingdao Ecopure, November 3, 2026.
- LG, LT500P listing on Amazon: "6 Month / 500 Gallon Capacity", checked November 3, 2026.
- Amazon listings and prices: read from Amazon. Prices as of November 12, 2026 at 12:18 PM ET. We show a price only if we read it in the last 24 hours.
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