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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  • MSRP: 84.99

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

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 easy to install The filter functions as described. Happy with it.
Date published: 2018-02-27
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
Rated 5 out of 5 by from Taking care of my skin ! My skin and body does not like to be coveted in chlorine. Aquasana shower filters are the best way to treat your body. You'll know the difference immediately. I am sensitive from a heart operation and the way filtered water changes the way I feel is simply amazing. Aquasana shower filters I find are the best at what they do.
Date published: 2018-02-22
Rated 5 out of 5 by from Definitely worth it After just my first shower I noticed a difference in my hair. It was so much less frizzy & seemed much less dry. I asked my boyfriend if he noticed the difference & because he thought it was silly he said he thought it was his new shampoo, but he finally admitted to noticing the difference. I definitely recommend this to anyone.
Date published: 2018-02-20
Rated 5 out of 5 by from Super small design and easy install We've owned carbon filters before that were twice this big and so we really love the compact design which also keeps the shower nozzle the same height as before you connect it. Wonderful water too! We even are tempted to drink this water rather than use our undercounter system. It was a 2 minute install as well. Just keep tightening till you don't have any leaks. You will love it.
Date published: 2018-02-20
Rated 5 out of 5 by from Home Easy to install. I buy for filter the shower from chloride .
Date published: 2018-02-19
Rated 5 out of 5 by from Makes my hair soft This filter on my shower removes many of the chemicals that make my hair brittle and coarse, no I bought one for my boyfriend and have noticed his hair is looking softer and shiner.
Date published: 2018-02-16
Rated 5 out of 5 by from Quality filter Shower filter was easy to install and is a great quality filter.I'm very happy and would purchase again
Date published: 2018-02-16
Rated 5 out of 5 by from Best Shower Filters Fast professional, courteous service and the shower filters in my opinion are the best that I've seen on the market.
Date published: 2018-02-16
Rated 5 out of 5 by from Does the job It does what it is intended to do. I can take a long hot shower if I want and my skin is not irritated and dried out like it was before without it because of the excessive amount of chlorine added to the water where I live
Date published: 2018-02-14
Rated 5 out of 5 by from Easy to install ! Live in area with real hard water. It made the shower more enjoyable, no chlorine smell anymore. Itchy skin has improved greatly, real glad we installed in our showers.
Date published: 2018-02-12
Rated 5 out of 5 by from Best filters I've had! I've bought 5-6 shower filters from you and decided to buy another brand because of a sale. It was terrible! I love your filters and only buying your's!!
Date published: 2018-02-12
Rated 5 out of 5 by from Hard water, be gone! I got this for my son and his wife whose water is so hard she was rinsing her hair in COLD water filtered in the kitchen. They both say this is awesome! (I got this for them because I have the whole house filter in my house and love it.)
Date published: 2018-02-12
Rated 5 out of 5 by from Perfect I have been using shower filters for about 12 years now, and I intend to keep on. Wouldn't want to take a shower without one!
Date published: 2018-02-09
Rated 5 out of 5 by from Great Water Filter It's been two months and my skin is smooth. The water is clean and smells really purify water.
Date published: 2018-02-09
Rated 5 out of 5 by from Did what I needed Before installing the shower filter I could smell the chlorine and the water made my hair feel weird. Now my hair is soft (no change in shampoo or conditioner). I did not smell anything! It was fabulous!
Date published: 2018-02-09
Rated 5 out of 5 by from Really works This is my second filter. The first was given to me as a gift by my parents. The water in my area smells and tastes like nothing but chlorine. Right after installation the chlorine smell was gone. After use for a few months my hair is smoother and my skin is less dry. Great product
Date published: 2018-02-07
Rated 5 out of 5 by from Filters All Chemicals Made a huge difference in the water with this filter. No more inhaling chlorine water while taking hot showers. The problem is the the filter cap which needs to better quality which causes leaking. I'm just happy as long it does it jobs. Thank you Aquasana.
Date published: 2018-01-11
Rated 5 out of 5 by from Notice the difference Makes a noticeable difference in the water quality!! Love it! High quality product
Date published: 2017-12-27
Rated 5 out of 5 by from No more dried out skin and hair Had great support from Aquasana staff getting me set up for "water for life" program. Have been using shower filters for about three years. Love 'em!
Date published: 2017-12-25
Rated 5 out of 5 by from High flow shower head We previously had a low flow shower head so noticed the increase in the flow. I had thought the filter would slow the flow but it doesn't. Easy installation, according to my husband. Wish I had included the hand held piece.
Date published: 2017-12-25
Rated 5 out of 5 by from Easy install for great water These filters makea huge difference in scent and smell. I have been using them for several years
Date published: 2017-12-21
Rated 5 out of 5 by from Love it! Super easy to set up, the water tastes amazing, and customer service is awesome!
Date published: 2017-12-20
Rated 5 out of 5 by from Squeaky Clean I just got the shower filter &’s great the water comes out very pristine & clear. I can notice difference in my hair is much softer & I think chlorine is gone . so ,if you want to be good to your body get the Aquasana shower filter & you will be happy , like me.
Date published: 2017-12-20
Rated 5 out of 5 by from Husband loves the new shower head... ...even though he never complained about the one he removed. We may have the water analyzed just to show the actual condition of potential pests but we are fully enjoying it ever since its very easy installation!
Date published: 2017-12-19
Rated 5 out of 5 by from Great shower filter! great product. much softer hair and skin. Easy to install
Date published: 2017-12-19
Rated 5 out of 5 by from Great filters! My family absolutely loves these shower heads and filters. The city we live in has pretty horrid tap water and aquasauna saves the day! We have been buying these along with the r/o system for about 3 years now. I could really imagined not having them.
Date published: 2017-12-15
Rated 5 out of 5 by from As expected Seems to work fine. Had to get an adapter from Aquasana for one of the showers in which the pipe leaves the wall vertically and is too close to the wall to screw on the filter. The 45-degree adapter worked well. Doesn't leak, but did lower the pressure a little bit. I didn't notice much but my wife did.
Date published: 2017-12-06
Rated 5 out of 5 by from Oh, my hair feels so much better! There is incredibly hard water where I live, so I researched a water softener/filter, and bought this Aquasana product. I paid for it easily, and received it in the mail. Installation was easy, and my hair and skin thank this shower filter! My hair is not so dull and nasty-feeling anymore - I really feel like I am cleaning myself when I take a shower now that that filter is installed!
Date published: 2017-12-04
Rated 5 out of 5 by from Works Excellent! I moved to apartment with hard water and was experiencing skin rashes. I purchased this filter system and my skin improved significantly!
Date published: 2017-12-04
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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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