Premium
Shower Filter

The essential health and beauty product.

AQ-4125 shower water filter replacement

Just need a replacement? Click to jump to our shower replacement. Shop Now

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 1215.
  • y_2019, m_7, d_17, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.12
  • cp_1, bvpage1
  • co_hasreviews, tv_145, tr_1070
  • loc_en_US, sid_2, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getAggregateRating, 39.72ms
  • REVIEWS, PRODUCT
  • MSRP: 84.99

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

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–7PM CDT
  • 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

Product
Enhancing

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

How It Works

Premium
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 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
Rated 5 out of 5 by from It’s great Love the filter so far! My skin feels less dry and my hair is adjusting better to my new shampoo routine!
Date published: 2018-05-28
  • y_2019, m_7, d_17, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.12
  • cp_1, bvpage1
  • co_hasreviews, tv_145, tr_1070
  • loc_en_US, sid_2, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getReviews, 4.17ms
  • REVIEWS, PRODUCT

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 shower filter remove lead in the water

Asked by: Shec
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. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-15

Does it remove sulfur smells?

Asked by: AJG1
Our water in Stockton California does occasionally emit a sulfur odor from our Taps . The aquasana shower filter totally eliminates the sulfur odor as well as Chlorine or any other VOC`s that we have found from time to time. My wife Deborah and myself Highly recommend this filter for better health . We are living examples and will continue it`s use where ever we go. !!!!!!!
Answered by: KerDeb
Date published: 2018-05-12

We are on a well so cholorine is not a concern. How effective is this filter at removing other impurities? Particularly iron? 

Asked by: MAWitzman
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. If you are on well water, please contact us directly at 866.662.6885. We do have a specialty shower filter that is designed to better handle the heavy metals and other components typically found in ground water. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-11-29

After installing just the filter and replacing my own hand shower I notice the water current becomes weak very significantly. What should I do to improve the slow and weak water current?

Asked by: Melissa_ns
The optimum flow rate for the filter and shower head is 2.5 gallons per minute, and the system has an operating pressure range of 20-80 PSI. If you are experiencing slow flow, and you are certain that the filter was flushed properly and your shower head is not clogged with carbon, then you may want to check the flow rate of your shower head, and the PSI of your shower. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-11

Could you tell me if it reduces the pressure of the water?  I have well water.  What kind of heavy metals are removed from the water? Thanks, Jackie

Asked by: Jackie65
Hello! You should not experience a noticeable drop in pressure when you install the system. Since you are on well water, please contact our team at 866.662.6885 so that we can send out a special shower filter specifically designed handle the heavy metals typically found in well water. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-11

I need replacement filter # AQ-4125 is this the one?

Asked by: Wendy -Anne
Hello, Replacement shower cartridges can be found here - https://www.aquasana.com/shower-head-water-filters/shower-replacement Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-10

Does this remove lead? Do you have one that does?

Asked by: GSG2
hank 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. If you are on well water, please contact us directly at 866.662.6885. We do have a specialty shower filter that is designed to better handle the heavy metals and other components typically found in ground water. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-10

Does it take out fluoride?

Asked by: Jonas
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. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-27

Does the shower filter remove flouride? This is the most dangerous one.

Asked by: DonnaLuv2005
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. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-09

It talks about reduction of chlorine, how about chloramine? How about other continents in the water, fluoride... your website isn't very clear, or perhaps I missed it. Thanks, Loraine

Asked by: Lola2626
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. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-27

I noticed the last few times I've turned my water on, the water looks brown-ish when it hits the shower floor. Could it be that it is nearing time to replace my filter? The filter is not quite 6 months old yet (about 5 months); water pressure fine still

Asked by: ToniK
Hello! It sounds like your system has done its job and trapped dirt and rust inside. Now that the filtration media has started to degrade and you are nearing the end of the filters lifespan, bits of dirt and rust are being released with that initial surge of water through the system. This is nothing to be concerned about, just let the water run for a few seconds until its clear, and then shower as you normally would. Keep in mind that 6 months is our standard recommendation, so you may need to change the filters a bit more frequently if you start to notice a change in filtration quality. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-27

Saw in one of the reviews to ask for the chloramine filter option. We have cholarmine added to our water. How do we request that for our shower filter

Asked by: Bobby T-Town Cowboy
Hi Bobby, Just reach out to our sales team at 866.662.6885. They will place the order for you in house, and ensure that a chloramines shower system is sent out for you. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-05-09

Does the shower filter remove CHLORAMINE (as opposed to chlorine)?

Asked by: Ablesq
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 Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-05

Is the shower head adjustable

Asked by: Shan17
Yes. You can adjust the spray and position of the head.
Answered by: ElliotG
Date published: 2018-03-31

I have well water and the smell that goes along with that (rotten egg smell). The water is also very "hard". Will this filter eliminate that or is it just for chlorine?

Asked by: robin28348
it didn't even remove chlorine
Answered by: Slava
Date published: 2018-03-23

Does this come with filter

Asked by: Yvette
Yes it does. Tha filter then needs to be replaced every six months. 
Answered by: Mountain woman
Date published: 2018-04-28

How do you know when to replace filter?

Asked by: diane66
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
YES
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

Can I install this filter with my existing showerhead?

Asked by: Linda68
It's advised to use their showerhead with the filter.
Answered by: Frizzy hair blues!
Date published: 2017-11-08

I installed a water softener system in our house but my hair still turns green, and it must be the copper pipes.  Does this product reduce or eliminate copper at point of shower head?

Asked by: Cd1234
I have hard water but no water softener so I understand the buildup on faucets. I haven't have any buildup on my shower head since using this.
Answered by: Pondering
Date published: 2017-11-01

I want to use my own shower head on my filter but I can’t adjust my shower head to point down far enough because it hits the filter when trying to adjust it. Is there an extension I can use to make the shower head come out more so I can adjust it?

Asked by: Carol
As a homeowner, I would think so. I advise you ask a local plumber or a local "box store" plumbing department. Or, try searching online using your pipe size and desired length.
Answered by: T79senior
Date published: 2017-11-30

In Amazon the price for this is ways higher than it is here. Could you guys take a look at it?

Asked by: Deepu
Thank you for your interest in Aquasana! Unfortunately we do not have direct control over the pricing of our products on Amazon. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-11

We have a shower head and a hand nozzle as well. Will this work? I want one without a shower head. 

Asked by: Amanda
Thank you for your question. You can certainly 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. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-20

hi i have well water and wondered how this works with well water/ i want a softening effect

Asked by: tammy
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 Customer Support
Date published: 2017-10-24

How many months does one filter last

Asked by: Tracy
Thank you for your question! Each filter cartridge is good for 6 months. Please let us know if you have any other questions or concerns and anyone on the team will be happy to assist. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-10-11
  • y_2019, m_7, d_19, h_24CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.12
  • cp_3, bvpage2n
  • co_hasquestionsanswers, tq_99
  • loc_en_US, sid_2, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 145.19ms
  • QUESTIONS, PRODUCT