An award-winning, NSF certified shower filter designed to reduce chlorine while maintaining verified reductions of PFAS and particulates — supporting healthier skin, hair, and everyday water wellness.
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Weddell Duo Shower Filter
Independently Third-Party Tested
Tested by independent, accredited laboratories to verify performance and safety.
Welcome to step zero of your self-care routine®! Weddell Duo Shower Filter is the ultimate solution for cleaner, healthier showers. NSF certified and verified to reduce harmful PFAS and particulates, the Weddell Duo enhances your shower experience while promoting better skin and hair health. Its patent-pending dual cartridge system allows you to easily monitor the filtration process, with clear filters that show when it’s time for a replacement. Designed for tool-free installation, the Weddell Duo is compatible with all standard shower heads and delivers optimal water flow without compromising performance. With long-lasting filters that provide up to 8,000 gallons of clean water, the Weddell Duo ensures every shower is a step toward improved wellness.
Key Features
Removes 99% of chlorine, PFAS, and particulates
The #1 NSF Certified Shower Filter in Performance for flow rates, capacity, and contaminant reduction
Clinically tested to improve skin hydration and scalp health
Dermatologist approved
Easy installation and compatibility with various shower heads
Long-lasting filters with visible monitoring and up to 8,000 gallons of use
What's in the Box: Weddell Duo Filter Case with 1 full set of Cartridges, plumber's tape, user guide
*Local water conditions, especially in areas with high contamination levels, may affect the filtration speed and lifespan of the filters, potentially requiring more frequent replacements.
Shipping & Returns
At Weddell Water, we strive to get your order to you as quickly as possible. All orders are shipped out on the next business day (excluding weekends and holidays) after confirmation, ensuring a fast turnaround.
If for any reason you’re not satisfied with your Weddell Duo after use, you have 30 days from the date of purchase to return it for a full refund, no questions asked. This guarantee applies to all Weddell Duo Shower Filters purchased directly from Weddell Water.
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Why Weddell Duo?
We take pride in delivering exceptional filtration and wellness benefits with the Weddell Duo, offering a shower filter that truly transforms your daily routine.
Toxin free showers
Increased skin hydration
Healthier, moisturized scalp
Supports overall health
WEDDELL
OTHERS
NSF Certified
Public Test Reports
“Forever Chemicals” PFAS Reduction
Particulate Reduction
Clinically Tested
Derm Approved
Proven results you can trust
99%
Chlorine Reduction
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Certified by NSF in 2023
*Weddell Duo was certified by NSF International.
99%
PFAS Reduction
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Verified by IAPMO Lab in 2023
*Weddell Duo was verified by an accredited lab.
99%
Particulates Reduction
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Verified by IAPMO Lab in 2023
*Weddell Duo was verified for particulate reduction.
Weddell Duo
The Weddell Duo uses a two-step, directional filtration system designed to filter shower water efficiently while maintaining strong water pressure. Water flows from top to bottom through each stage, allowing each filter to do its job without restricting flow.
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1
Water entry
Shower water enters the Weddell Duo through the top connection and flows downward through the filtration system.
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Step 1: Sediment Filter
Water first passes through the white sediment filter, which captures larger particulates such as sand, rust, and sediment. This initial stage helps protect the carbon filter and supports consistent water flow.
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Step 2: Activated Carbon Filter
After sediment filtration, water flows through the black activated carbon filter, which reduces chlorine and other chemical contaminants commonly associated with skin and scalp dryness or irritation.
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Filtered water exit
Once filtered through both stages, water exits through the bottom of the unit and continues to the shower head.
How to install
1
Detach shower head
Remove your existing shower head. Make sure the shower arm threads are clean and free of debris. Confirm both O-rings are properly seated.
2
Install
Hand-tighten the Weddell Duo onto the shower arm. If needed, apply 2–3 wraps of plumber’s tape to ensure a secure seal.
3
Reattach
Reattach your shower head to the bottom of the Weddell Duo and ensure the unit is aligned straight. Run water for 3 minutes to flush the filter, your shower is now ready to use.
Frequently Asked Questions
What makes Weddell Duo different from other shower filters?
The Weddell Duo is unique in several key ways:
Certified & Verified Performance: It’s the only shower filter certified by NSF to reduce Free Available Chlorine, while also maintaining verified performance in reducing PFAS and particulates, and other contaminants. Most other filters don’t have these certifications and can't guarantee the same level of protection.
Clinically Tested & Dermatologist Approved: Weddell Duo has been clinically tested to improve skin hydration and scalp health, and is dermatologist approved, making it an excellent choice for those with sensitive skin or scalp concerns.
Clear Dual Cartridges for Easy Monitoring: The Weddell Duo has clear dual cartridges, allowing you to see the condition of your filters. The right sediment filter shows discoloration over time, signaling when it needs to be replaced.
Long-Lasting Filters: Weddell Duo’s filters have a life cycle of up to 8,000 gallons, offering longer-lasting protection compared to many other filters on the market.
Easy Installation: Installation istool-freeand the Weddell Duo is compatible with a variety of shower heads, including rain, fixed, and handheld models.
How often do I need to replace the filter cartridges?
You should change your filters if any of the following occurs: 1) 5-6 months has passed, 2) you notice decreased water pressure and/or filter discoloration, or 3) when the rated capacity of the filter cartridge has been reached.
The frequency of replacement depends on your water usage and the quality of your water supply. Regular replacement ensures that your shower water remains clean and safe.
What contaminants does Weddell Duo remove?
Weddell Duo is designed to significantly reduce a wide range of contaminants including chlorine, PFAS, and particulates. This helps to improve the quality of your shower water for healthier skin and hair.
What are the reduction percentages for the contaminants that Weddell Duo removes?
Weddell Duo Shower Filter is NSF certified and has been rigorously tested and verified by an accredited third party lab to ensure high performance. Below are the specific contaminants it removes:
Free Available Chlorine: 99%
PFAS: 99%
Particulates: 99%
While Weddell Duo reduces other contaminants, we only publish reduction claims for those we have tested using established industry standards to prioritize transparency and reliability. Please see our testing data here for the most updated information.
Can I install the Weddell Duo Shower Filter myself?
Yes, the Weddell Duo Shower Filter is designed for easy, tool-free installation. It fits most standard showers and can be installed in minutes without the need for professional help.
Will installing Weddell Duo affect water pressure?
Weddell Duo is designed to have minimal impact on water pressure. Since our maximum Gallons Per Minute (GPM) rate is 2.8 GPM, which is much higher than typical shower heads (2.5 GPM or less), your overall water pressure will be determined not by Weddell Duo, but by your shower head.
However, as Weddell Duo reaches its full capacity, the accumulation of filtered impurities may slow down the water pressure. This is an indication that it's time to replace the filter cartridges to ensure optimal performance and maintain water pressure.
I've tried other shower filters, and for quite a long time I was using the Aquasana shower filter thinking I was getting the best protection. Then I saw a review comparing the different filters and realized that my Aquasana wasn't filtering out all of the bad chemicals and the Weddell does. I purchased the Weddell and have been extremely happy with it. My city water is hard and forces me to change the white filter more often but Im okay with that given the quality of the water its providing.
Hello Kevin, thank you for sharing such a detailed comparison of your experience. We are glad to hear that Weddell Water is providing the high level of filtration you were looking for, even with your local hard water. It is rewarding to know our product is making a positive difference in your home.
J
John smith
Amazing profuct
Worked really well
Hello John, thank you so much for sharing your experience. We are thrilled to hear that your Weddell Water filter is working really well for you. We appreciate your support and are glad to have you as part of our community.
P
Phyllis Wexler
Great Filter
Love my new Weddell Duo Filter. My hair is so much more manage and my skin is not dry and flaky anymore. I’m going to put a second one in my other bathroom. It definitely makes a difference.
Hello Phyllis, we are so happy to hear that the Weddell Duo Filter has made such a difference for your hair and skin. It is wonderful to know you are adding a second one to your home, and we truly appreciate your support. Thank you for being a valued part of our community.
R
R Eastman
Highly recommend!
We have used the filter for approximately 8 months. My persistent skin rash cleared up a few weeks after we installed it and it has not returned! I love this filter!
Hello R Eastman, thank you so much for sharing your experience with us. We are thrilled to hear that our filter helped clear up your skin rash and that you are enjoying the results after eight months of use. It is wonderful to have you as part of the Weddell Water community.
C
Christina
Better skin and hair!
My skin rashes have healed up, and our skin is so much softer! My hair doesn’t fall out as much and feels thicker and softer. We have really hard water, so unfortunately have to replace filters really often, that’s the only bad thing about this system. Wish it lasted longer before having to buy another filter.
Hello Christina, we are so pleased to hear that your skin and hair are feeling much softer and healthier since using our system. Regarding the filter life, please note that as long as your water pressure remains steady, the cartridges are still performing effectively despite the hard water. Should you need further assistance with your specific setup, please reach out to our support team directly.
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