Premium
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 1128.
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50% OFF SHOWER FILTERS - limited time!
  • MSRP: 84.99
  • Sale: 49.99

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

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–6PM CST
  • SAT–SUN: 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

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 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
Rated 5 out of 5 by from Love it! Our water has so many chemicals added to it. My skin and head would itch and develop small sores. My shower filter has changed all that. My skin feels great and my hair is soft and shiny.
Date published: 2017-12-03
Rated 5 out of 5 by from Fantastic Out of the Box I have been using aquasana for the last 3 years in the middle east. This is the first time I bouth the products directly in their Web page before I was using amazon, but amazon does not have all the range of products. The transaction was painless and the product it just works.
Date published: 2017-12-03
Rated 5 out of 5 by from Helps my hair and skin I love aquasama shower filter but it needs an update or adapter . The problem is that I would like to have different shower heads and it doest fit well. Maybe an adapter going up so the shower head and hose don’t touch the body of the filter. I have used the shower filter since 2002 and love it. It helps my skin and hair. But I am surprised that it has not changed at all. I understand that if it is good, it should stay the same ....but at least an adapter would be nice. When I travel I feel a huge difference in my hair and skin because without the aquasama filter the water makes my hair dry and my skin very dry. Customer service has always been wonderful. I highly recommend this product. You must buy it! You will be amazed what a difference it makes :)
Date published: 2017-11-25
Rated 4 out of 5 by from Not sure I bought this filter and it came two dsys ago,, it was easy to put on the pipe that came out of the wall.. I just bought the filter because i had my own shower head.. the water is still hard so i am not sure i like the filter..i was hopping the water would have a little softer..i will try it for the next 5 months and i will see at the end of the filtering, if i dont like it i will not buy another's filter..Herb
Date published: 2017-11-21
Rated 5 out of 5 by from LIKE NIGHT AND DAY DIFFERENCE IN OUR WATER QUALITY My wife and I purchased and installed this filter about 2 weeks ago. What a difference in how our skin and hair feel. Plus the comfort of knowing the filter is removing any contaminates in the water.
Date published: 2017-11-20
Rated 4 out of 5 by from Well designed. Easy to install, easy to use. I have read that when warm water opens one's pores, we absorb more contaminants during a shower than we do drinkig water, so I'm glad I have both. If that isn't true, please don't use this.
Date published: 2017-11-20
Rated 5 out of 5 by from No more chlorine! I purchased this shower filter because the water quality in my area is very high in chlorine. My shower water became instantly softer and no longer smells! Installation is easy, just be sure to tighten appropriately so there is no water leakage. I can immediately tell a difference between my shower water and faucet water now. This is a MUST buy!
Date published: 2017-11-16
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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

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: 2017-12-06

Can I install this filter with my existing showerhead?

Asked by: Linda68
It's advised to use their showerhead with the filter.
Answered by: Charlotte
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
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