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 1219.
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$5499 SELECT SHOWER FILTERS until Oct 14
  • 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 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
Rated 5 out of 5 by from One product always you can trust The installation is very easy and the taste of water is great. Also the price is low in comparison with the product's quality.
Date published: 2018-12-23
Rated 5 out of 5 by from Excellent Pleased with my purchase. Would recommend to people I know.
Date published: 2018-11-10
Rated 5 out of 5 by from Cleans water very good! Our shower filter was easy to install and worked with our shower head. Installation only took a few minutes. My skin isn't as dry and my hair is smooth. We live in southern Florida and this shower filter sets my mind to ease that we are using clean water.
Date published: 2018-11-08
Rated 5 out of 5 by from My only regret is that I didn't buy this sooner. I have been suffering with dull, dry, unmanageable, brittle hair for years. My house has extremely hard water. I did not want to get a whole house water softening system because I hate to bathe with soft water. It feels so slick. I bought the shower head about 6 weeks ago and noticed an immediate improvement in my hair. After every shower, my hair gets better and better. The water is obviously softer but it does not have that slippery soft water feeling. It feels...perfect. I am very, very happy that I took a chance on this product. It was too inexpensive not to try.
Date published: 2018-07-09
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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 your shower head take out calcium and magnesium carbonates, bicarbonates and sulfates that causes hardness?

Asked by: Paul wants soft water
Thank you for your interest in Aquasana! Due to the high flow rate of shower filtration systems and the minimal contact time with filtration media, this system is only certified for chlorine reduction. We do know that the media used can help reduce volatile organic chemicals, herbicides, pesticides and other chemical compounds, as well as lead and other heavy metals. That being said, we are currently unable to provide an exact percentage of these reductions. We do have a shower filter cartridge specifically designed for well water which is available by request. It contains a media that is better suited to handle the hard minerals and heavy metals found in well water, but is not intended to soften you water. Thank you, Aquasana Customer Support
Answered by: Aquasana S
Date published: 2019-09-24

What's the shipping time After ordering

Asked by: Dave o
Hello Dave, Our shiping is 3-5 buisness days for expedited shipping and 7-10 buisness days standard shipping . Thank you! -Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-21

I have a keratin treatment in my hair and the sulfur in no washes it out which filter removes the most sulfur and chlorine?

Asked by: Ginger nut
Hello, It appears you have several questions that would best be answered by a consultation with one of our experts over the phone. Please call our sales department at 866-662-6885, options 1 and 1 to discuss a potential solution for your home. Thank you, Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-21

Exactly what does this filter filter for besides chlorine? I am looking for a list.

Asked by: Lisa Marie
Hello Lisa, Thank you for your question. I have provided our performance data sheet down below. If you need further assistance please contact us at Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-03

How does this product affect the water pressure coming out of the shower head?

Asked by: Daughters_Apartment
If you have normal pressure, use any shower head you want with no real loss of pressure. If you have restricted flow already from old pipes or block or even low flow pipes, do not use low flow shower head. I have had 2 different homes using this filter and notice mo real dropoff in pressure.
Answered by: Mjones5970
Date published: 2019-07-14

Does this filter need a prop65 warning?

Asked by: Aisha
Hello, No, this item does not require a proposition 65 warning. If you have any further questions please contact us directly at 866-662-6885, Monday thru Friday from 8am-6pm CST, and weekends from 9am-5pm CST. - Aquasana Support
Answered by: Aquasana S
Date published: 2019-07-11

How often does one need to change the shower filter?

Asked by: Turk
every 6 months
Answered by: josephina
Date published: 2019-06-22

When i am ready to purchase a filter, am i better to purchase the replacement or the whole product? Price is about the same, which inludes the head.

Asked by: Annie filter
Using the auto ship where I get a new filter in the mail at the appropriate time works best for me. It’s one less thing to keep up with. I don’t see any reason to change the head. It still looks good. 
Answered by: June9
Date published: 2019-06-27
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