Shower Filter

The essential health and beauty product.

AQ-4125 shower water filter replacement

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Select a shower head option: with Shower Head
  • Shower filter with head
  • Shower filter without head
  • Shower filter with white wand
  • Shower filter with chrome wand
Shower Filter is rated 4.6 out of 5 by 1225.
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  • MSRP: 84.99

Save 20% + free shipping with Water for Life $67.99

Questions? We can help

  • 866-662-6885
  • SAT: 9AM–5PM CDT
  • SUN: 10AM–4PM CDT

Whole Health

Feel the Difference

Reduce your skin's exposure to harsh chlorine and synthetic chemicals that can cause skin damage and excessive drying.

Shower in Aquasana filtered water for noticeably softer, more moisturized skin.

Whole Health

Stronger, Healthier Hair

One of the most important things you can do for hair is to wash it with filtered, chlorine-free water. Your hair will be noticeably softer and shinier, your scalp will be healthier and your color will stay true and last longer.

— River Lloyd, celebrity stylist of the
John Frieda Salon in New York

Whole Health

Ultimate Versatility

Choose from our premium massaging shower head or premium massaging handheld wand for multiple massage settings to customize your shower experience.

The Aquasana Shower Filter also works with most 2.5 GPM shower heads so you can keep your own shower head.

Pure Performance

Patented copper/zinc media and coconut shell carbon

Natural coconut shell carbon filters out chlorine and other harsh chemicals, while copper/zinc media further reduces chlorine and enhances water pH balance.

The Aquasana shower filter improves air quality, enhances water pH and removes over 90% of chlorine for the healthiest shower experience.

Please see our Performance Data Sheet for complete test results.

Pure Performance

Easy Installation

Attaches easily to shower pipe.

Long lasting filters only need to be replaced twice a year.

Pure Performance

Superior Design

Aquasana's unique upflow design prevents media channeling and clogging, retains shower head height and water pressure, and increases water contact time with media for superior filtration and unmatched results.

Pure Performance


Naturally enhance your bath products and hair treatments. Use less shampoo, conditioner, soap and body lotions.

How It Works

Shower Filter

Removes over 90% of chlorine in shower water

  • 10,000 gallons
  • 6 month filter life
  • 1 year warranty
  • 90 day guarantee
See How It Works
certified by NSF

NSF Certified Media

Certified to Standards 42
and 61

AquaSorb™ HX coconut shell carbon reduces chlorine and synthetic chemicals

KDF 55 PROCESS MEDIA copper/zinc blend further reduces chlorine and enhances pH

Easy to install, replace and maintain

Help & Support

Video Help

  • How to install the shower water filter
  • How to replace the AQ-4105 shower filters

Installing the shower water filter

Replacing the filter in the AQ-4100

Learn More

Read the Reviews

Rated 5 out of 5 by from The best shower head in twenty years Installation is easy and it's the best shower head I can ever remember using.
Date published: 2020-02-18
Rated 5 out of 5 by from Shower filter My hair is completely improved. What more can I say?
Date published: 2020-01-27
Rated 5 out of 5 by from My hair says thank you every day!! My hair felt healthier from the first time I used the water filter. And my skin is softer as well. Little did I realize was this was the same water filter my parents have been using for years. And I always like the way my hair felt when I visited them.
Date published: 2020-01-05
Rated 5 out of 5 by from Awesome Filter The filter was easy to install but the metal connector was hard to attach to the inflow pipe. It was rather slippery. Other than that, the water quality has improved and the water acquired a better smell. It also became softer on the skin. I highly recommend this.
Date published: 2020-01-02
Rated 5 out of 5 by from great product I am enjoying the shower filter especially good for my hair. My skin feels better,less dry and itchy. I will recommend to a friend.
Date published: 2019-09-10
Rated 5 out of 5 by from Thank you for giving me my hair back! I was renting a room from some friends who had well water, which they "softened", and there was WAY too much salt in the water. As a result, my hair was dry, frizzy and felt like straw. In my new apartment I easily installed my filter, by myself (and I'm only 5'4" tall), and allowed it to run clean as the instructions say. Within 3-4 days, the change in my hair was really noticeable. It is softer, more manageable and so much less frizzy. I can't wait to see how things are in a month or two!
Date published: 2019-06-27
Rated 5 out of 5 by from Love it! Looking to purchase more products! We live in a city with municipal water, after having grown up with mountain well water. Although it’s not spring, the change in feeling after showering is wild! Skin is much less irritated and feels much better. Pressure is great and choices of flow are awesome!
Date published: 2019-05-08
Rated 5 out of 5 by from Love this filter I love this filter, my shower head doesn’t get build up, I feel like the water is cleaner and doesn’t smell like Chlorine anymore. I also have been recommending this to all of my hair clients!
Date published: 2019-01-21
Rated 5 out of 5 by from Love it! The installation was very easy. I will always use a shower filter from now on.
Date published: 2018-12-23
Rated 5 out of 5 by from No more itchy skin or bad hair! My entire family noticed the difference immediately! There was so much chloramide in our city water you could smell it and I couldn’t put enough lotion on to combat my dry itchy skin. My hair looked terrible. I cannot imagine being without now. Even my husband noticed how it made his hair soft. My daughter and I who both have long hair love it! I’ve had so many compliments on my hair and don’t need all the hair products to make it look nice.
Date published: 2018-12-23
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Learn More

Aquasana FAQs

  1. Do I have to pay for a plumber to install the system?

    Aquasana shower systems are very easy to install, and you can do it yourself in minutes. No plumber is necessary. If you have any questions or need assistance, our technical support representatives at 866-662-6885 can walk you through the installation process.

  2. What is the flow rate of the AQ-4100, AQ-4100NSH, & AQ-4105?

    The optimum flow rate for the filter and shower head is 2.5 gallons per minute.

  3. Can I use my own shower head or hand-held wand with the AQ-4100?

    Yes, you can use your own shower head. The AQ-4100NSH is the correct model for individuals using their own shower head. Just remember the shower head needs to have the same 1/2 inch connection as standard shower heads and the ideal flow rate would be 2.5 gallons per minute. If your shower head processes more than a 2.5 gallon flow rate per minute, the quality of filtration may degrade slightly. Increasing the flow rate by changing the shower head reduces contact time with the media and will reduce the filtration quality. If you decrease the flow rate of the system by using a different shower head, or use a shower head with a shut-off switch, you may cause damage to the system and void your warranty.

  4. Can I use the shower system for drinking water?

    Drinking some of the water during your shower poses no health risk. However, Aquasana does not recommend that you use the shower system as a primary drinking water source since it is not designed as a drinking system and has only been tested under shower conditions and regulations.

  5. Can I hook the shower system up under a constant pressure application?

    No, the shower system is designed to allow the water to consistently pass through the system as it filters. If the system is under constant pressure and unable to release the pressure introduced into the system during filtration, damage can occur to the unit.

  6. How do I know if the Aquasana shower system will fit the shower pipe coming out of my wall?

    Most shower connections are 1/2 inch, which means that the Aquasana shower systems will fit the shower pipe in most homes.

  7. How much chlorine does the shower system remove?

    Aquasana shower systems are tested to remove 91% chlorine for 10,000 gallons.

  8. How do I know how many showers it takes to use 10,000 gallons?

    10,000 gallons at 2 1/2 gallons per minute = 4,000 minutes of showering
    - You can take 400 10-minute showers
    - You can take 267 15-minute showers

Learn More

User Q & A

Are the aquasana filters sold on amazon the same as from your site? I bought  one and the flow went down significantly...about 50%. I am returning it and ordering from you. 

Asked by: Soco
I've purchased Aquasana filters from both Amazon and Aquasana direct. They are the same. There are a lot of other manufacturers on Amazon that make "replacement" filters. I've tried a few and were not happy with any of them.
Answered by: ElliotG
Date published: 2020-02-28

Does filter remove sulfur smell?

Asked by: Sulfursmell
Yes! I was diagnosed with sulfur intolerance so showering with this filter prevents itchy rashes. I thought it might be a placebo effect but when I showered in another person's shower with no filter for several days, I started getting rashes again.
Answered by: Helps with sulfur
Date published: 2020-02-16

Does this filter remove iron?

Asked by: Reggy
Hello, Thank you for your question. Unforutnately, the shower system will not help to remove nor reduce iron in your water. Aquasana Shower System's will reduce your skin's exposure to harsh chlorine and synthetic chemicals that can cause skin damage and excessive drying. Thank you, Aquasana
Answered by: Aquasana S
Date published: 2020-02-10

I have the Aquasana shows filter and have just replaced the first cartridge. I'm wondering if you have a recycling program for used cartridges??? Or do I need to throw the old cartridge in the garbage?

Asked by: too much plastic
Hello, Thank you for your email. Unfortunately, we do not offer a recycle program at this time. After careful research and consideration, we discovered it's more harmful to the environment to have our customer's ship back the product. The fossil fuels involved with this process and th energy used to recycle would be counter-productive. You should be able to put the filter(s) in with the other plastic in your recyclables and either throw out the carbon or use it for plant fertilizer. The carbon is not at all harmful to the environment. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-01-06

Can this unit remove radon?

Asked by: Suzy concerned
Hello Suzy, Thank you for your question. No our shower system will not remove radon. If you need further assistance please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-12-04

How much does the filer weigh? 

Asked by: Kally_
Hello Kally, Thank you for your question. The weight of the shower system is 3 pounds. If you have any further questions please contact us at 866-662-6885. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-12-04

Do tiny little charcoal pieces ever come out of anyone’s shower head when it’s first turned on? I bought mine in October and it started doing that recently. 

Asked by: ShayMarie
I have never noticed this. We've been using these shower filters for about 10 years now and love them.
Answered by: Hope
Date published: 2019-11-24

brand new shower filter leaks gasket in on place, how i can fix it

Asked by: Mauricio
Use thread tape. You can find it at any local hardware store. Wrap it around the threading of the pipe before you attach the filter. Wrap it the same way you are going to twist on the filter.
Answered by: Call me handy
Date published: 2019-11-19
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