The light on the faucet base changes color, and you open the cabinet door to look at the plastic housing under the sink. You read WHEMB40 on the side. You need the right WHEMB40 replacement filters, and we stock the exact set. One box holds all three cartridges, and this guide gives you the match, the price and the change steps. Your system filters the water at the point of use, at the separate faucet on the sink, and the new set brings the flow and the taste back to normal. Our under sink water filter guide covers how these systems work in general, and this page covers your model.
The WHEMB40 and the WHAMBS5 take the same filter set
Owners of either model buy the same box, and the model number on the housing under the sink tells you which one you have. The part is the Whirlpool WHEMBF, and the set contains all three stages of the purifier: filter 1, filter 2 and filter 3. Whirlpool builds them as encapsulated UltraEase cartridges. Encapsulated means the media stays sealed inside its plastic shell, and you never touch the wet carbon or the dirty sediment layer. Water stays inside the cartridge during the swap. The sealed design keeps the change clean and quick, and it keeps the cabinet under the sink dry.
The set also answers to three other numbers. You might read 652333 or 7313721 on a box, or 790065 in a manual. A box with any of those numbers holds the same three cartridges, and Whirlpool uses the different codes across different manuals and retail boxes. Whether your housing says WHEMB40 or you searched for WHAMBS5 replacement filters, the one Whirlpool WHEMBF set is the match. Match your housing to that one part number and the search is over.
What the set reduces
The manufacturer's listing for these cartridges covers sediment, chlorine taste and odor, lead, cysts, chemicals and pharmaceuticals, and bacteria and viruses. The cartridges reduce those items as water flows through the three stages. The first stage takes the dirt and rust, and the second and third stages take the chlorine taste and the smaller particles. We partner with Whirlpool, and our products meet NSF/ANSI Standard 42. The filters catch the particles before the water reaches the separate faucet. Clear water reaches your glass, your coffee pot and your cooking pot from the same tap, and the taste of the tap water in the rest of the house does not change.
Three filters for one price
Order the Whirlpool WHEMBF Under Sink Replacement Filters for $108.99 and you receive three new cartridges in one delivery. That one price covers the whole replacement cycle, and it works out to $36.33 per stage. You get a factory replacement set made by Whirlpool for the manifold under your counter. The cartridges twist into the housing under your sink, and the package holds the three filters and the instruction sheet. The battery for the faucet light is no longer included. You supply your own battery and change it when you change the three cartridges, and the fresh battery keeps the reminder light counting through the next cycle. We ship the set to your door, and you line the three stages up on the counter before you open the cabinet.
How to change the WHEMBF set
The encapsulated cartridges twist out of the manifold. Your owner's manual gives the exact sequence for your model, and this general procedure applies to both the WHEMB40 and the WHAMBS5. Clear the cabinet under the sink first so you have room to work, and lay a towel under the manifold.
- Shut the cold water feed valve under the sink.
- Open the purifier faucet to relieve the pressure.
- Twist out each old cartridge.
- Discard the old cartridges.
- Twist in each new cartridge until it locks.
- Open the cold water feed valve.
- Check the manifold base for leaks.
- Flush the first gallons of water through the new set.
- Reset the faucet reminder light per the manual.
A new cartridge set needs a flush before you judge the taste. Our refrigerator water filter troubleshooting guide explains that a new carbon cartridge sends air and loose carbon fines through the first gallons, and they clear. The water runs cloudy with air bubbles at first, and the dark fines wash out of the carbon. Let the water run until the stream looks clear. The manual gives the flush time for your model. Change the battery in the faucet base and reset the timer to start the new cycle. The whole change takes a few minutes, and you need no tools beyond your hands and a towel for the cabinet floor.
The reminder light is the clock
Whirlpool sets the replacement interval for the purifier, and we publish no separate interval. The reminder light on the faucet base signals when the interval ends. That light is the clock you follow. The set replaces all three cartridges at once, and that keeps the three stages on one schedule. The sediment stage fills up and the carbon stages reach capacity on the same clock, and the light tells you when the media has reached its limit. You never guess which filter is due, and you never run one stage past its life while the others still have months left.
You pull all three old cartridges, install the three new ones, and the cycle starts over with the light back to its ready color. Owners of a WHER25 or WHAROS5 system follow a different path, because those reverse osmosis systems run the filters and the membrane on separate cycles. Our Whirlpool reverse osmosis guide covers those models. The WHEMB40 takes the one three pack on one clock.
Set the reorder on Subscribe and Save
The light changes on a busy week and the order slides to the weekend after, and the weekend after that. Weeks of filtered water turn into weeks of water passing through spent cartridges. Our Subscribe and Save program ships the set on a schedule you pick, at three months, six months or a year, with a standing 5 percent discount on every recurring shipment. On the WHEMBF set, 5 percent off $108.99 is $103.54. The box arrives before the light changes, and the fresh cartridges wait in the cabinet for the next cycle. You skip the manual reorder, and the discount applies to every scheduled shipment. You can pause a shipment if you leave town or change the schedule from your account, and the exact match stays on hand.
Our Under Sink Water Filters collection holds the other under sink cartridges we stock, and our Whirlpool collection covers the rest of the Whirlpool line, from refrigerator cartridges to whole house housings. A household with a Whirlpool refrigerator filter and a WHEMB40 under the sink can put both cartridges on one plan and one delivery.
Frequently Asked Questions
Do the WHEMB40 and WHAMBS5 use the same replacement filters?
Yes. The WHEMB40 and the WHAMBS5 share one replacement set, the Whirlpool WHEMBF. The manifold on both models accepts the same three cartridges, and both models take a full swap of all three stages at once. One box services either system in your kitchen.
Does the WHEMBF go by any other part number?
Yes. The WHEMBF set also answers to 652333, 7313721 and 790065. A box with any of those numbers contains the same three cartridges, and Whirlpool uses the different codes across different manuals. Order the WHEMBF to replace any of them.
Does the WHEMBF come with a battery?
No. The battery is no longer included in the box. You supply a battery for the faucet light and install it during the filter change, and the new battery keeps the reminder light running for the next cycle.
How do I know when to change the WHEMB40 filters?
The filter reminder light on the faucet base shows when it is time for replacement. Whirlpool sets the interval, and the light signals it. Replace all three cartridges together when the light calls for it, and put a fresh battery in the faucet base at the same time so the light keeps counting.
Order the set and clear the light
You own a Whirlpool under sink purifier and you want clean water from the faucet. We sell the factory set for your manifold and ship it to your home. You twist out the old cartridges and twist in the new ones, and the sealed shells keep your hands clean. The fresh media brings the flow rate back and takes the chlorine taste out of the water at the tap. Order the Whirlpool WHEMBF Under Sink Replacement Filters today. Call 855-789-3278 with the model number off your housing if you want us to confirm the match. We answer the phone Monday to Friday, 9 to 3 Central, and you can email info@poseidonfilters.com. We are Poseidon Filters. We sell the filter set, and we do not install or service the purifier.
Reviewed by the filtration specialists at Poseidon Filters, who match residential and office systems to the correct OEM cartridges every day.