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 1167.
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$5499 SELECT SHOWER FILTERS until Mar 19
  • MSRP: 84.99
  • Sale: 54.99

Save 50% + free shipping with Water for Life $42.49

Questions? We can help

  • 866-662-6885
  • SAT: 9AM–5PM 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 Its wonderful! I bought two of the shower filters, one for each bathroom. I have sensitive skin, dry hair, and itchy skin from the water where I live. After I put both filters in my bathroom and took a shower in my bathroom I could tell the difference right away on my skin and hair! I am so glad I ordered them, which by the way was a buy one get one free during the president day sale in February! Awesome deal and price! P.s. I know brush my teeth in the shower because of the clean water!!
Date published: 2018-03-14
Rated 4 out of 5 by from Excellent quality and Service ! The quality of the unit itself, with very easy installation, makes it a great addition to one's bathing enjoyment. The massage showerhead is more effective than I had expected , and the purified now-soft water is a BIG improvement !
Date published: 2018-03-13
Rated 5 out of 5 by from Great product One shower is all it takes to see the difference! Our kids have really sensitive skin and the shower filter is really helping noticing less dry and itchy skin. From start to finish, the process of installing this shower filter was a breeze.
Date published: 2018-03-08
Rated 4 out of 5 by from so far so good Needed a shower filter to get out bleach, which is used to take magnesium out of water. It works great
Date published: 2018-03-08
Rated 1 out of 5 by from Poor design The short nozzle for the shower head prohibits use of larger shower heads. While I really like Aquasana water filters in general, this particular filter needs a better design.
Date published: 2018-03-07
Rated 5 out of 5 by from Our new shower filter I am glad that the filter was a fairly quick installation. The fact that the chlorine is not in the shower water anymore is a relief to me. My skin does not feel as dry afterwards.
Date published: 2018-03-07
Rated 1 out of 5 by from It does not do what it claimed it does after a week of use tested the water coming out of the shower head and it tested positive...still quite a bit of chlorine coming out which is why I purchased it in the first place!
Date published: 2018-02-27
Rated 5 out of 5 by from easy to install The filter functions as described. Happy with it.
Date published: 2018-02-27
Rated 4 out of 5 by from Love it!! We have very rusty water and our water softener wasn’t enough!!! This has worked fabulous for getting rid of the rust!! Don’t have a yellow shower anymore!!!!
Date published: 2018-02-23
Rated 5 out of 5 by from Love the shower filter! I purchased this a little over a month ago. We temporarily moved into a rental and have very hard water. Within two weeks I saw a huge difference in my hair as far as dryness and shine. My skin was less dry and itchy. I haven’t had to adjust the spray on the shower head at all as it was perfect from the factory.
Date published: 2018-02-22
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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

Does this come with filter

Asked by: Yvette
Yes it does. Tha filter then needs to be replaced every six months. 
Answered by: Mtnwmn
Date published: 2018-02-24

How do you know when to replace filter?

Asked by: Winslow
Minimum 6 months usage. Filter will start to clog with sediment and other things, this will reduce flow rate. So if reduced flow is noticed or at the very least twice a year.
Answered by: Mjones5970
Date published: 2018-02-22

Is this shower filter compatible with my costco shower head Waterpik Cayman Handheld Shower Head with 14-spray Settings?

Asked by: Tatiana
The shower filter fitting is same size as what comes out of wall. Hope this helps.
Answered by: cputraveler
Date published: 2018-02-06

Does the AG 4105 remove or reduce chloramine?  

Asked by: Ritz
Yes. I used my Palin pool test kit to measure the tap water and the filtered water and saw a 90% reduction in the chlorine level.
Answered by: Jared
Date published: 2018-02-19

Before I purchase this I just want to ale sure that’s the shower device and a filter?

Asked by: Felicia
Answered by: SONVUTOY
Date published: 2018-01-20

What size should be the water pipe.

Asked by: Saeed
Most shower connections are 1/2 inch, which means that the Aquasana shower systems will fit the shower pipe in most homes. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-01-17

Does it filter sulfer out??

Asked by: Hydro
Our shower filters are certified to NSF standards 42 and 61. The media will help reduce any odors that come from the sulfur in your water during the filtration process. Please let us know if you have any additional questions!
Answered by: Aquasana Customer Support
Date published: 2018-01-11

Water comes out around the seal even after installing a new filter. I have tighten it as far as I can. Any thoughts on what I should do next?

Asked by: Dick
Hello! Please contact our service team at 866.662.8665 and anyone here will be happy to assist in troubleshooting the leaking system. We look forward to hearing from you! Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-02-27
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