Two questions decide an LG water filter LT1000P purchase. Does ADQ74793501 fit this refrigerator, and what does the cartridge cost. The answers are yes if the fridge calls for LT1000P, and $28.99.
The complication sits one shelf over. The LG LT800P looks like the same cartridge, carries a similar twist-in collar and the same 1 5/8 inch diameter, and costs $49.99. A shopper who grabs the wrong one pays twenty-one dollars extra for a cartridge that will not seat. This guide prints the length that separates them and the live price of every LG cartridge in the catalog.
Does ADQ74793501 fit this refrigerator?
ADQ74793501 is LG's internal part number for the cartridge sold at retail as LT1000P. One cartridge, two designations. A fridge manual that calls for either name takes the Replacement L G LT1000P Refrigerator Water Filter at $28.99.
LG uses the same two-name pattern across its filter line. Every current cartridge carries a short retail name beginning LT and a longer internal number. Reading the retail name off the old cartridge is the fastest route to a match.
| LG retail name | LG internal number | Price |
|---|---|---|
| LT500P | 5231JA2002A | $19.99 |
| LT600P | 5231JA2006A | Out of stock |
| LT600P-B | 5231JA2006B | Out of stock |
| LT700P | ADQ36006101 | $24.99 |
| LT800P | ADQ73613401 | $49.99 |
| LT1000P | ADQ74793501 | $28.99 |
Every price above is the live single-cartridge price in the LG refrigerator water filters collection. The two LT600P rows carry no price because Poseidon Filters cannot ship either cartridge today. The order of the remaining numbers is worth a second look. A higher LT number does not mean a higher price on this line, and the LT1000P sits twenty-one dollars under the LT800P.
LT1000P against LT800P: two inches and twenty-one dollars
These two cartridges cause more wrong orders than the rest of the LG line put together. They share a diameter of 1 5/8 inches. They share the twist-in mounting. They sit next to each other in every catalog, and the higher number costs less.
Length is what separates them, and both product pages publish it.
- The LT1000P listing gives an actual size of 5 3/8 inches long by 1 5/8 inches in diameter.
- The LT800P listing gives an actual size of 7 3/8 inches long by 1 5/8 inches in diameter.
Two inches of cartridge body is the whole difference. An LT800P cabinet has a deeper filter bay, and an LT1000P dropped into it will not reach the seal at the back of the housing. An LT1000P cabinet has a shallower bay, and an LT800P will not let the door close on it.
The practical test takes ten seconds with the old cartridge in hand. Lay a tape measure along the barrel. A cartridge just over five inches is an LT1000P at $28.99. A cartridge just over seven inches is an LT800P at $49.99.
The third lookalike: LT700P
Adding the LT700P completes the fit test. That cartridge measures 6-7/8 inches long by 1-3/4 inches in diameter on its listing. The length sits between the other two and the diameter runs wider than either.
| Cartridge | Length | Diameter | Price |
|---|---|---|---|
| LT1000P | 5 3/8 in | 1 5/8 in | $28.99 |
| LT700P | 6-7/8 in | 1-3/4 in | $24.99 |
| LT800P | 7 3/8 in | 1 5/8 in | $49.99 |
Diameter is the faster read of the two measurements. An LT700P barrel runs an eighth of an inch fatter than the other two, and that eighth stops it entering an LT1000P or LT800P housing. Length then separates the remaining pair by two full inches.
Pressure, and the cartridge that needs more of it
The three listings publish operating pressure bands that do not match each other.
- The LT1000P runs from 20 to 120 psi.
- The LT800P runs from 20 to 125 psi.
- The LT700P runs from 25 to 125 psi.
The lower bound is the one that bites. A home on a well with a pump cut-in near 20 psi sits under the LT700P minimum at the bottom of every pump cycle, and the dispenser drops to a trickle until the pump restarts. The LT1000P and the LT800P both hold their rating down to 20 psi.
Municipal supply rarely raises this question. A house on city water sits inside every band above.
When the refrigerator says Kenmore
LG builds a share of the refrigerators sold under the Kenmore name, and those filter bays came across unchanged. The LT800P listing states the cartridge is compatible with Kenmore 9490.
A Kenmore owner holding a cartridge stamped 9490 is therefore holding an LT800P in different packaging, and the $49.99 LG cartridge drops straight in. A Kenmore owner who cannot find any number at all should read the appliance model plate and call 855-789-3278.
What the carbon does in these cartridges
The LT700P listing is the most specific page in the LG line on media and certification. It names activated carbon as the filtration media and carries NSF certification under standards 42 and 53.
That listing also names what the media reduces: rust, dirt, sediment, limescale, sand, silt, algae, cysts and turbidity. Standard 42 covers taste and odor claims. Standard 53 covers health-related claims, and cysts sit under it.
Standards 42 and 53 are the two most common certifications on residential refrigerator cartridges. A household choosing between LG cartridges on water quality should read the certification line on each product page, because LG does not publish the same claim set at every position in the line.
Price is the wrong place to start on a cartridge that filters everything a family drinks and cooks with. Start with the fit, then read what the listing certifies, and let the price land where it lands. On the LT1000P the cheapest correct answer happens to be the only correct answer, and that makes this one an easy purchase.
Where LG prints the number on the refrigerator
The retail name appears on the cartridge barrel in printed text that rotates out of sight once the collar locks. Two other places carry it after the old cartridge has gone in the bin:
- The inside of the filter access door often carries a decal naming the cartridge for that cabinet.
- The owner manual lists the filter part in its maintenance section, keyed to the appliance model on the plate inside the fresh food compartment.
An appliance model number resolves the question when neither one is readable. The Poseidon Filters team at 855-789-3278 matches an LG model to its cartridge on the call.
What else the LT1000P listing publishes
Two more operating numbers sit on the LT1000P product page, and neither appears in the tables above.
- Flow rate of 0.5 gallons per minute. That figure sets how fast the dispenser fills a glass with a clean cartridge in place.
- Operating temperature of 33 to 100 degrees Fahrenheit. That band describes the water passing through the cartridge.
The temperature band matters in one specific place. A refrigerator standing in an unheated garage draws through a supply line that can reach freezing on a cold night, and water under 33 degrees falls outside what the cartridge is rated to handle. Ice inside a cartridge splits the housing, and the leak turns up on the garage floor. Wrapping the run of supply line inside the garage keeps the water in the rated band for less than the price of one cartridge.
The LT600P pair, and what a cabinet takes while both sit out of stock
LG sells two cartridges under the LT600P name and the collection carries both. Neither one ships today.
- Replacement LG LT600P Refrigerator Water Filter 5231JA2006A is out of stock.
- Replacment L G LT600P-B Refrigerator Water Filter 5231JA2006B is out of stock.
The trailing letter on the internal number is the whole distinction between the two. A cabinet built for the 5231JA2006B revision takes the LT600P-B, and the A revision takes the plain LT600P. Copy that internal number off the old cartridge, because the letter decides which revision an LG cabinet accepts.
Nothing else in the collection fits an LT600P cabinet, so an LT600P household has no substitute to order today. The Poseidon Filters team at 855-789-3278 gives the restock date on either revision and takes the details for the reorder.
What the multipacks save, and what a plan saves
The LT1000P sells in four pack sizes. The per-cartridge cost falls as the pack grows, which is unusual on filter lines and worth doing the arithmetic on.
| Pack | Price | Per cartridge |
|---|---|---|
| 1 Pack | $28.99 | $28.99 |
| 2 Pack | $58.50 | $29.25 |
| 3 pack | $74.99 | $25.00 |
| 6 Pack | $145.99 | $24.33 |
The two-pack costs more per cartridge than a single. The three-pack drops the unit price by four dollars, and the six-pack takes another sixty-seven cents off. A household committing $145.99 today buys about three years of filtration at $24.33 a cartridge.
The Subscribe and Save page publishes a standing 5 percent discount on every recurring shipment. On the three-pack that is $3.75 off, bringing each cartridge to $23.75 and beating the six-pack unit price without $145.99 leaving the account at once. The page also states the rule that makes the schedule work. Set the interval to the manufacturer's rated replacement window for the cartridge, and LG publishes that window on the product listing. The guide to how the subscription plan works walks through the setup.
The pack size that costs more than singles
Pack pricing follows no single rule across the LG line, and one pack size runs backwards.
The LT700P sells at $24.99 for one cartridge and $49.98 for two. The unit price holds flat there. The three-pack at $77.99 works out to $26.00 a cartridge, a dollar more than buying three separately. The six-pack at $146.99 comes back down to $24.50.
Reading the per-cartridge number before checkout catches this in a moment. The Subscribe and Save discount of 5 percent applies to whichever pack a plan carries, and on a single LT700P it brings the cartridge to $23.74.
The compatible cartridge on the LG line, and where it stands today
The collection carries one compatible cartridge against the LG range. Gold Series GS-L1 Refrigerator Filter Fits LG LT500P and Water Sentinel WSL1 covers the LT500P position, and it sits out of stock today. An LT500P household still has a route that ships now. The Replacement LT500P/ 5231JA2002A L G Premium Refrigerator Water Filter at $19.99 is the genuine LG cartridge for that cabinet and it is in stock.
For the LT1000P position the LG cartridge at $28.99 is already the low-cost answer in the catalog. Nothing in the collection undercuts it for that cabinet.
Frequently asked questions
Is ADQ74793501 the same filter as LT1000P?
Yes. ADQ74793501 is the LG internal part number and LT1000P is the retail name for one cartridge. A refrigerator manual naming either one takes the same $28.99 filter.
Will an LT1000P fit an LG refrigerator that takes an LT800P?
No. The LT800P is 7 3/8 inches long and the LT1000P is 5 3/8 inches long, both published on their product pages. The shorter cartridge will not reach the seal at the back of an LT800P housing.
Why does the LT800P cost more than the LT1000P?
The two cartridges are different parts with different lengths and different LG part numbers, and LG prices them separately. A higher LT number carries no price rule on this line, which is why the LT1000P at $28.99 sits under the LT800P at $49.99.
What is the difference between LT600P and LT600P-B?
The internal numbers 5231JA2006A and 5231JA2006B name two revisions of the same position. Read the internal number off the old cartridge, because that letter decides which revision fits the cabinet. Both revisions sit out of stock at Poseidon Filters today, and the team at 855-789-3278 gives the restock date.
How fast should the dispenser run with a new LT1000P?
The listing publishes a flow rate of 0.5 gallons per minute. A slower fill on a fresh cartridge usually means air is still in the line from the install, and it clears once several gallons have run through.
Measure once, then stop thinking about it
The LG line comes down to two readings. Take the retail name off the barrel, then confirm the length with a tape measure. A five-inch cartridge is the LT1000P at $28.99. A seven-inch cartridge is the LT800P at $49.99. Anything shorter with a wider body is the Replacement LG LT700P Refrigerator Water Filter at $24.99, which the listing gives as 6-7/8 inches by 1-3/4 inches.
Every cartridge above sits in the LG refrigerator water filters collection. Putting the right one on a Subscribe and Save plan at 5 percent off ends the measuring for good, because the correct cartridge arrives on its own schedule from then on.
A household that also runs a Whirlpool or Maytag refrigerator can run the same part-number check in the Whirlpool part number guide. An office manager ordering break-room cartridges and return-air filters together will find the air-side rules in the MERV 8 sizing guide.
Reviewed by the filtration specialists at Poseidon Filters who match residential and office refrigerators to the correct cartridge every day.
Our newer guides cover the Kenmore 46-9890 / GEN11042FR-08 for the LT500P slot and the LG LT700P refrigerator water filter guide.