De'Longhi replacement water filters fit specific machine models and come in two main types
De'Longhi makes water filters for espresso machines, automatic coffee makers, and combination units. The filter you need depends on your exact machine model — a filter for an espresso machine will not work in an automatic drip coffee maker, even if both are De'Longhi. Before you order, check your machine's model number on the back or bottom of the unit.
De'Longhi sells two filter styles: cartridge filters that slide into a holder, and filters that screw directly onto the water inlet. Some machines use a filter basket that holds a standard cartridge; others have a permanent filter housing built into the water tank. Knowing which type your machine uses saves you from buying the wrong part.
Genuine De'Longhi filters cost between $15 and $35 depending on the model. Third-party filters are cheaper but may not fit as precisely or last as long. De'Longhi filters typically need replacement every two to three months if you use your machine daily, or every four to six months with lighter use.
Key Takeaways
- Find your machine's model number before ordering a filter — it is printed on a label on the back or underside of the unit.
- De'Longhi filters come as cartridges that slide into a holder or as screw-on filters that attach to the water inlet, and the two types are not interchangeable.
- Genuine De'Longhi filters cost $15 to $35 and last two to six months depending on how often you brew.
- You can order filters directly from De'Longhi's website, from Amazon, or from appliance retailers like Best Buy and Williams Sonoma.
How to identify your machine's filter type
Open your machine's water tank and look inside. If you see a plastic cartridge holder — a small cup or basket that sits in the tank opening — your machine uses a cartridge filter. The cartridge slides into this holder and can be removed and replaced without tools. This style is common on De'Longhi automatic coffee makers and some espresso machines.
If your machine has no visible holder inside the tank, check where the water line connects to the machine. If a filter screws onto the inlet valve before the water line attaches, you have a screw-on filter. These are more common on De'Longhi espresso machines and combination units. Screw-on filters require a wrench or filter wrench to remove and install.
Your machine's manual will also state the filter type and the correct replacement part number. If you no longer have the manual, search online for "[Your Model Number] manual" — De'Longhi publishes PDFs for most models on their support pages and on sites like ManualsLib.
Where to buy De'Longhi replacement filters
De'Longhi's official website sells filters directly and lists them by machine model. You enter your model number and the site shows you the correct filter and its price. Shipping usually takes five to seven business days.
Amazon carries most common De'Longhi filter models and often ships them faster — sometimes in two days with Prime. Read the product listing carefully to confirm it matches your machine's model number. Third-party sellers on Amazon sometimes list filters under multiple model numbers, so cross-check against your machine's label.
Best Buy, Williams Sonoma, and other appliance retailers stock De'Longhi filters in-store and online. In-store pickup is an option at Best Buy if you need the filter the same day. Local appliance repair shops sometimes stock De'Longhi filters and can confirm the right model while you wait.
How to install a cartridge filter
Turn off and unplug your machine. Remove the water tank by lifting it straight up or pressing the release button on the side, depending on your model. Empty any remaining water into a sink.
Locate the filter holder inside the tank opening — it looks like a small plastic cup. Grip the old filter cartridge and pull it straight out. Some cartridges twist counterclockwise to release; check your manual if it does not pull free easily.
Rinse the filter holder under running water to remove any sediment or mold. Unwrap the new cartridge and soak it in cold water for ten minutes. This saturates the filter media and ensures it works properly from the first brew. Insert the cartridge into the holder, pushing straight down until it clicks or seats fully. Reattach the water tank and run one full tank of water through the machine without coffee to flush the filter.
How to install a screw-on filter
Turn off and unplug your machine. Locate the water inlet valve — it is usually on the back or side of the machine where the water line enters. Place a small bowl or cup underneath to catch any water that drips when you remove the old filter.
Use a filter wrench or adjustable wrench to turn the old filter counterclockwise. De'Longhi sells filter wrenches for about $8, or you can use a standard adjustable wrench if the filter nut is accessible. Once the old filter is loose, unscrew it by hand and set it aside.
Wrap the threads of the new filter with one layer of plumber's tape (also called PTFE tape or Teflon tape). This prevents leaks. Screw the new filter onto the inlet valve by hand until it is snug, then use the wrench to tighten it an additional quarter turn. Do not over-tighten — this can crack the filter housing. Plug in the machine and run water through it for 30 seconds to check for leaks before brewing.
Signs your filter needs replacement
Water flows more slowly through the machine than it did when the filter was new. This happens because sediment and mineral deposits clog the filter media. Slower flow means the machine has to work harder and may overheat.
Your coffee tastes flat or bitter, or has a slight chemical taste. A clogged filter cannot remove chlorine and other compounds that affect flavor. If you notice a change in taste even though your coffee beans are fresh, the filter is likely the cause.
The filter housing shows visible sediment or discoloration inside. Some machines have transparent filter holders where you can see buildup. If the cartridge looks brown or gray instead of white, it is time to replace it. Screw-on filters cannot be inspected visually, so follow the two to six month replacement schedule based on your brewing frequency.
Cartridge filters versus screw-on filters: which lasts longer
Cartridge filters and screw-on filters have similar lifespans — both last two to six months depending on water hardness and how often you brew. Hard water clogs filters faster than soft water because minerals accumulate more quickly. If your tap water is hard, you may need to replace your filter every six to eight weeks instead of every three months.
Cartridge filters are easier to replace because they require no tools and take less than five minutes. Screw-on filters require a wrench and take slightly longer, but they are less likely to leak if installed correctly. Neither type is objectively better — the choice depends on your machine's design.
Some De'Longhi machines let you use either type with an adapter kit. Check your manual to see if your model supports this. Adapter kits cost $10 to $20 and let you switch between filter styles if you prefer one over the other.
Frequently Asked Questions
Can I use a generic water filter instead of a De'Longhi filter?
Generic filters sometimes fit De'Longhi machines, but they may not seal properly or filter as effectively. De'Longhi filters are designed to fit the exact dimensions of your machine's holder or inlet valve. A loose fit can let unfiltered water bypass the cartridge. If a generic filter is cheaper, test it with one tank of water first and watch for leaks.
What happens if I do not replace the filter?
A clogged filter slows water flow and forces your machine to work harder, which can damage the heating element or pump over time. Unfiltered water also leaves mineral deposits inside the machine, reducing its lifespan. Most De'Longhi machines will eventually stop brewing if the filter becomes completely blocked.
Do I need to descale my machine if I use a water filter?
A water filter reduces mineral buildup but does not eliminate it entirely. You should still descale your De'Longhi machine every three to six months, depending on your water hardness. Descaling removes deposits that the filter cannot catch. Check your manual for the descaling cycle specific to your model.
Where is the model number on my De'Longhi machine?
The model number is printed on a label on the back of the machine, on the underside near the power cord, or inside the water tank area. It usually starts with "EC" or "DL" followed by numbers. Take a photo of the label so you have the number when you order a filter online.
Can I clean and reuse my water filter?
De'Longhi filters are not designed to be cleaned and reused. Once a cartridge is saturated with sediment and minerals, rinsing it does not restore its filtering ability. Reusing a clogged filter defeats the purpose of having one. Replace it according to the schedule for your water hardness and brewing frequency.