Shower Filter

The essential health and beauty product.

AQ-4125 shower water filter replacement

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Select a shower head option: - no Shower Head
  • Shower filter with head
  • Shower filter without head
  • Shower filter with white wand
  • Shower filter with chrome wand
Shower Filter - No Shower Head is rated 4.6 out of 5 by 1257.
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50% OFF SHOWER FILTERS - limited time!
  • MSRP: 79.99
  • Sale: 44.99

Save 50% + free shipping with Water for Life $39.99

Questions? We can help

  • 866-662-6885
  • SAT: 9AM–5PM CST

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 Love it I have long fine hair that has not held the color for years. Especially in the summer it gets quite brassy. Discovered it was the minerals in our well water stripping my follicles. Since installing the filter, my hair feels and looks healthier and it is maintaining my color.
Date published: 2020-11-06
Rated 5 out of 5 by from So far so good The difference was amazing, rinsing my hair was suddenly super easy. I was struggling with buildup in my hair, this solved the problem. My skin has improved as well. I was worried that it wouldn't hold my showerhead and would be unstable but its perfectly fine.
Date published: 2020-10-28
Rated 5 out of 5 by from Shower Filter Experience I’m truly enjoying showering in fresh, purified water. I haven’t used a filter in a while because the water pressure with a previous unit (from another company) was so poor that I just didn’t replace it when the time came. But this filter was easy to install and the water pressure is excellent..... so I signed up for auto ship replacement filters. One less thing to worry about! My hair and skin feel great and I don’t have to think I about the harmful effects of chlorine..... especially for the lungs.
Date published: 2020-10-26
Rated 5 out of 5 by from No Itches Any More For years I have had an itchy head...changed shampoos and used other types of filters. Since using the Quasana filter my head stopped the itching. I was even on well water with filters and still had an itchy head. It was immediate after installing the Quasana filter. stopped itching. Wonderful!
Date published: 2020-10-15
Rated 5 out of 5 by from My hair says "thank you" I have not had a "bad hair day" since I installed this shower filter. After a wash, my hair is silky soft, no longer frizzes, and I no longer need a ton of hair product to get a nice smooth blow-out. My skin is also less dry, but the difference in the condition of my hair is really amazing.
Date published: 2020-10-07
Rated 5 out of 5 by from Great! I love showering with soft water. It feels like showering in bottled water. It leaves absolutely no odor or residue. The water even comes out clearer. I remember the water would come out with a darker shade before the filter but now it’s crystal clear and soft like rain water. I recommend 100% especially if your looking for soft glowing skin.
Date published: 2020-10-05
Rated 5 out of 5 by from Life changer! I purchased my 1st filter from Aquasana about 6 years ago. I had moved into a new house and my hair was very quickly turning into a huge pile of curly frizzy hay and was so hard I hated touching it or trying to do anything with it. Nothing worked for it. (Hair products, conditioners hair masks etc) I started looking into what the cause could be and read something that said my water could be the problem. I tried other filters from Walmart and Home Depot but nothing has worked like this company! It changed my hair and skin. My hair is back to its old Waves silky softness! I will never go back to not using a water filter after this. If your on the fence about purchasing it just do it! You won’t regret it.
Date published: 2020-09-18
Rated 5 out of 5 by from It's the highest rated of its kind for a reason My hair and skin feel so much softer than before I had this filtering system. I would recommend users be sure they tightly screw in the filtration canister before turning on the water. Mine was a little loose and sprayed black water (from the carbon in the filter) all over the place. Zero issues since.
Date published: 2020-09-08
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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

Besides chlorine, do these filters filter out any bacteria, heavy metals or nitrogen from the water? Mine would be used for well water. Thanks.

Asked by: MGG1983
Hello, We appreciate your interest in Aquasana! We have a process where we ask you some important questions about your home and water to ensure you’re getting the right solution for your home. We kindly ask you to reach our Water Specialists directly at 866-662-6885, Monday thru Friday from 8 am-6 pm CST, and weekends from 9 am-5 pm CST. -Aquasana
Answered by: -ACS
Date published: 2020-11-30

is it the filter water that is leaking from around the cartridge and the top housing? i want to make sure i am not wasting the filtered water. not sure how to fix the water leakage. its brand new and cartridge is tightly fixed to the top housing.

Asked by: April09
Hello, Thank you for reaching out! We would love to transfer this to a team specialist who is best-suited to answer any questions or concerns you may have.   Kindly email us directly at or contact us directly at 866-662-6885, Monday thru Friday from 8am-6pm CST, and weekends from 9am-5pm CST.   Thank you,   Aquasana Support  
Answered by: Aquasana S
Date published: 2020-10-20

How to stop water leakage from around the seam between the upper filter housing and the cartridge? I did not open the cartridge from the housing, it is bran new. i tested and the cartridge is tightly attahed to the top housing. not able to rotate it anym

Asked by: April09
I have not had this problem. I would call the company it sounds defective.
Answered by: DWalters
Date published: 2020-11-09

How well does this filter work for well water

Asked by: Crabb
Good Afternoon, We would love to transfer this to a team specialist who is best-suited to answer any questions or concerns you may have. Kindly email us directly at or contact us directly at 866-662-6885, Monday thru Friday from 8am-5pm CST. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2020-10-06

Does the shower filter remove chloramine and minerals as well as chlorine?

Asked by: Rianne
Hello, We do have a chloramine shower filter that can be sent out by special request. Just give us a call at 866.662.6885 and we can help you place the order. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2020-09-22

What size microns does this remove? There is a lot of concern about brain eating amoeba in the news.

Asked by: Juliez
Most amoeba are 250 to 750 microns in size. N. fowleri is microscopic: 8 micrometers to 1 5 micrometers in size, depending on its life stage and environment. By comparison, a hair is 40 to 50 micrometers wide.
Answered by: Mjones5970
Date published: 2020-11-07

How much chlorine is removed from the water ??

Asked by: Sage
Good Morning, Thank you for reaching out to us. The shower filter removes 90% of chlorine, I have provided a link down below for the performance date sheet. Please let me know if you have any further questions at 866-662-6885. Thank you, Customer Support
Answered by: Aquasana S
Date published: 2020-09-08

Will the water be discolored when shower filter requires changing?

Asked by: mJanineh
Yes, for a little while. Turn the shower  off and on several times til it runs clear. I use a bucket to catch the water and feed it to my garden. 
Answered by: Mountain woman
Date published: 2020-09-07
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