Sediment & Advanced Carbon Filter Replacement Pack

Model#: DWQ300700
Sediment & Advanced Carbon Filter Replacement Pack
Model#: DWQ300700
$11901
List Price: $198.35
Save $79.34 (40%)

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PRODUCT FEATURES
Replacement filter pack for the Delta® Clarifi™ Two-Stage Advanced Under Sink Water Filtration System. Certified by the IAPMO R&T Lab to reduce 72 contaminants such as chlorine, chloramines, PFAS, lead, and more when used with the Two Stage Advanced Under Sink Water Filtration System. Tool-free filter changes take less than a minute to replace each filter with a quick twist and lock mechanism. You can install with confidence, knowing Delta products are backed by our warranty and highly-trained customer support.
  • Reduces 72 contaminants including lead, PFOA/PFOS, chlorine, chloramine and cysts*
  • Certified by IAPMO R&T Lab against NSF standards 42, 53, 372 and 401 when used with the Clarifi™ 2 Stage System
  • Tool-free filter changes take less than a minute to replace each filter with a quick twist and lock mechanism
  • VIDEO TUTORIALS: Find more information in the included user guide, M&I and Delta Faucet’s YouTube
  • Recommended replacement: one year or 1,100 gallons, whichever comes first
  • For cold water installation only
  • No need to shut off water during filter changes
Documents & Specs
Installation Information
Number of Filters Included :
1
Max. Feed Water Flow (gallons per minute) :
0.63
Max. Feed Water Temperature (°F) :
100
Max. Filtered Water Flow (gallons per minute) :
0.42
Min. Feed Water Pressure (psi) :
20
Min. Feed Water Temperature (°F) :
41
Daily Production Rate (gallons per day) :
600
Overall Height (in.) :
13-3/8
Valve Type:
NA

INSTALLATION SUPPORT

Need help with installation? Find local Delta® installers. Get Quotes. Read reviews.

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REVIEWS
Rated 5 out of 5 by from Recommended for sure! This filter system is amazing!! It was very easy to install ourselves. The design is great and doesn’t take up a ton of space. The water looks, smells, and tastes clean and fresh!! Very effective.
Date published: 2026-02-24
Rated 5 out of 5 by from Yes!!!!!!!!! 💯 We haven’t installed it yet because we’re currently remodeling our kitchen, but the last photo shows where it will be placed. I’m so excited to have clean drinking water and finally get rid of our standalone purifier! Assembly looks very straightforward, and my husband had no concerns about installing it. I love that you can power it with batteries or purchase a cord to plug it in — I prefer the plug-in option so I don’t have to remember to change batteries. The sink it came with is beautiful and feels high quality. We’re building a wet bar for my coffee makers, so having clean, filtered water right there will be perfect.I can’t wait to get it installed and start using it!
Date published: 2026-02-11
Rated 4 out of 5 by from Water tastes better The screws that were included to mount the filters to the wall were not long enough. They fell out of the wall when the filters were mounted. We used different screws and mounted them to a shelf under the sink instead. The template showing where to mark for the screws was off by a quarter inch, which made for more work. The filters themselves work great. I have well water and these helped with the taste considerably. I'm happy with the filters themselves, but not with the installation items given.
Date published: 2026-02-07
Rated 3 out of 5 by from Set up was hard but end result was good We had a beverage faucet but it wasn’t hooked up so I thought this would be a really welcome addition to our home. And it was, however getting it installed was more complicated than we initially planned. We initially had a lot of hard spurting when we’d turn the faucet on. We thought it would subside but eventually the system started to rattle. We had a plumber come out and look and found the system wasn’t leveled properly which was leading to the issues. Now that it’s fixed, it works fine. The filtration is noticeably better than the tap water. I’m hoping maintenance and replacement of the filters won’t be too much of an issue now that the system is fixed.
Date published: 2026-02-02
Rated 3 out of 5 by from Couldn't install While I was very excited to install and try this under sink water filter, due to the age of the plumbing in my home it was not an easy "DIY." I will have to pay a professional to install.
Date published: 2026-01-12
Rated 5 out of 5 by from User Friendly I finally installed the Delta Clarifi 2-Stage Under Sink Water Filtration System and was pleasantly surprised by how easy it was to set up. The instructions were clear, everything connected easily, and the push-connect fittings made the process quick. I didn’t need any special tools or plumbing experience, and it fit nicely under my sink without taking up much space. As for the filtration — the difference was noticeable right away. The water tastes cleaner and fresher, and the chlorine smell is completely gone. It still has great water pressure, which I really appreciate. I also like that it’s a 2-stage system, so it filters out both sediment and other contaminants, not just improving taste but giving peace of mind too. Overall, it’s a solid, easy-to-use system that does exactly what it promises. Definitely worth it if you want better-tasting water without a complicated install.
Date published: 2026-01-11
Rated 5 out of 5 by from Get this water filter system, it’s a game changer! This delta clarifi 2 stage water filter for under sink is amazing!!! I was a little worried about installing this , but it was super easy to install. Everything you need for installation is included. I feel like the cartridges will last along time with the size they are. The filters just click in place. The display on the panel is great you can check the volume left on filter anytime. My family and I could taste a difference in the water almost immediately. This water filter is a going to save a lot of money, no more bottled water for us!
Date published: 2026-01-10
Rated 4 out of 5 by from We love this water filter. This system was super easy to install and use! It’s quite small and doesn’t take up much space at all. The design is perfect for convenient maintenance. I love it so far!
Date published: 2025-12-25
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Q&A

FREQUENTLY ASKED QUESTIONS

How should I decide which filter system to use?

Choosing the right water filter depends on your specific needs, water quality, budget, and installation preferences. Our two-stage system requires a dedicated beverage faucet and filters more contaminants, while the single stage system connects directly to your existing faucet with minimal effort.

Start by identifying the contaminants in your water. Check your local water utility’s Consumer Confidence Report (CCR) using our Water Quality Look-Up Tool or test your water with a DIY kit or professional service. Choose a filter that fits your installation needs and is certified to address the contaminants you’re targeting.

Under sink filters strike a balance of convenience, effectiveness, and affordability for most households, especially if your focus is cleaner drinking and cooking water.

Is the filter system hard to install?

The Clarifi system is designed for simple, DIY installation and comes with detailed instructions through the user guide and installation videos. However, the difficulty can depend on your DIY skills, tools and existing plumbing setup.

Tools You Might Need:

  • Adjustable wrench
  • Screwdriver
  • Drill (if a faucet hole is needed)

Note that this system can only be installed to a cold-water line. Running hot water through these systems will cause damage. Any compatible beverage faucet certified for use with water quality systems can work with this system. However, for optimal performance, we recommend using a Delta® Beverage Faucet, available in a variety of styles and finishes.

What do I need to know about replacing the filter cartridges?

The filters will need to be replaced about every 1 year or after it’s filtered 1,100 gallons, whichever comes first. The system will use audible alerts and the LCD digital display to notify you when it’s time to replace the filter.

You can order the replacement filters through our website or other vendors. Other brand filters are not compatible with the Delta system.

We designed the filters to be quick and easy to replace. Simply remove the old cartridge and install the new one with simple twist and lock quarter turn mechanism.

After you’re done, the filter cartridges can be thrown away. They cannot be recycled but are not hazardous waste, so standard disposal is okay.

How long do the batteries last? Is there an AC adapter I can use?

The system is designed to only be used with AA batteries. AC power cannot be used.

The 3 included AA batteries last approximately 2 years with a multiyear battery life.

Why do I need to flush the system for 10 minutes after install?

The flush primes the filter, ensuring you don’t drink gritty or off-tasting water later and the filter is saturated for optimal performance. Until the flush is done, the water might not meet the taste or clarity you expect from a new filter.

The filters are made of food-grade, nontoxic materials, so the flush water is not dangerous. However, we recommend caution when trying to re-use this water by watering plants as the carbon particles may affect sensitive plants.

How do I know the filter is working?

There are a few signs you can look for to tell if your new filter is working.

  1. Improved taste and odor: To test this, you can sample regular tap water from a separate faucet and do a side-by-side comparison against the filtered water.
  2. Clean water appearance: No visible particles, cloudiness or discoloration should be present.
  3. Check your lines for debris or your home’s’ water quality. The more contaminated your water, you may need to replace filters more frequently.
  4. Effective chlorine reduction: You can use a chlorine test strip to confirm the carbon filter is working.

I see that Mercury does not appear on the list of contaminants to be reduced/eliminated. I assume that this equipment does not eliminate this heavy metal, correct?

Asked by: Nenso
Hello Customer! Thank you for your question and we are happy to help. The Delta DWQ3502020 Certified reduction of more than 72 contaminants from drinking water when tested against NSF standards including: Chlorine Taste & Odor, Particulate Class 1, Chloramine, PFOA/PFOS, Cysts, Lead, Volatile Organic Compounds (VOC's), Emerging Contaminants, Microplastics, and Turbidity. A further list is linked below: https://media.deltafaucet.com/SpecSheet/DSP-K-DWQ3502020%20Rev%20A.pdf Mercury is not on this list. With any further questions or concerns, please do not hesitate to reach out to us again. Best Regards, Carrie
Answered by: Carrie
Date published: 2025-11-06

Does this system require a beverage faucet, or can it be connected directly to my sink faucet?

Asked by: Tori
Hi Tori Thanks so much for contacting Delta Faucet Company! Yes, the Clarifi™ 2-Stage Under Sink Advanced Water Filtration System installation requires a beverage faucet and cold water supply stop. Please reach out with further questions! Sincerely, Kelley Digital Communications Specialist
Answered by: Digital Specialist
Date published: 2026-05-12

I just installed the Clarifi 2-stage under sink water filter. Should the potable water light be flashing. Also in the manual it says the display should be on when I am using it. It only goes on when I press a button and goes off after a few seconds.

Asked by: Digital Display
Hi Digital Display, Thank you for your question about the Delta Faucet DWQ3502020. The display should stay on for about 10 seconds when dispensing or pressing a button. See a video that includes troubleshooting the display here: https://www.youtube.com/watch?v=KDS_p-cJIjk Please reach out with any additional questions! Best Regards, Bryan Digital Communications Specialist
Answered by: Digital Specialist
Date published: 2026-05-01

Is this system compatible with a Brizo beverage faucet? I would like to use the Delta system, but want to use a Brizo Litze or Kintsu cold water beverage faucet to use with it.

Asked by: Melissa
Hello! Thank you for contacting Delta Faucet Company! Our DWQ3502020 Pairs with a Delta® Beverage Faucet, available in a variety of styles and finishes. We appreciate your inquiry. Please reach out directly if you have further questions! Best Regards, Kyra Digital Communications Specialist
Answered by: Delta
Date published: 2025-11-03

how choose between Clarifi filtration sysem. One stage or two stage?

Asked by: Ronn
Hello! Thank you for contacting Delta Faucet Company! Our 2-stage kit includes the sediment filter cartridge and advanced carbon filter cartridge. This reduces 72 contaminants including lead, PFOA/PFOS, chlorine, chloramine and cysts. Our 1-stage kit includes manifold, high flow carbon filter cartridge, battery box, 3 AA batteries and hoses. This Improves water quality by reducing microplastics and chlorine taste and odor. We appreciate your inquiry. Please reach out directly if you have further questions! Best Regards, Kyra Digital Communications Specialist
Answered by: Delta
Date published: 2026-01-29

Is the Delta 2-Stage Under Sink Advanced Water Filtration System adaptable to use with my refrigerator water / ice cube system. I currently feed my refrigerator with a separate/single s/s line. Thanks

Asked by: Iceman
Hello Customer! Thank you for your question and we are happy to help. The Delta DWQ3502020 is a sink faucet filtration system. With any further questions or concerns, please do not hesitate to reach out to us again. Best Regards, Carrie
Answered by: Carrie
Date published: 2025-11-12
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