Shower Filter Replacement
AQ-4125 Shower Filter Replacement

Replacement filters for the Aquasana Shower Filter Systems

AQ-4100 shower filter

This replaces filters in the Shower Filters (AQ-4100, AQ-4100NSH and AQ-4105).

Replacement Filter for Aquasana Shower Filters is rated 4.7 out of 5 by 1945.
  • y_2018, m_4, d_26, h_6
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_184, tr_1761
  • loc_en_US, sid_7, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getAggregateRating, 17.04ms
  • REVIEWS, PRODUCT
  • MSRP: 52.50

Save 15% + free shipping with Water for Life $44.62

Questions? We can help

  • 866-662-6885
  • MON–FRI: 8AM–6PM CDT
  • SAT: 9AM–5PM CDT

Learn More

The BPA free, two-stage filter lasts six months, reduces chlorine and harmful chemical vapors, enhances pH balance, prevents soap scum build-up, and provides the highest quality shower water for the cleanest, healthiest shower experience.

Replacement filter for Aquasana shower filters. Comes with easy-to-follow replacement instructions.

Two-stage filter lasts 6 months, reduces chlorine and VOCs, enhances pH balance, prevents soap scum build-up and provides the very highest-quality shower water.

"It's like showering in natural spring water!"

Learn More

Read the Reviews

Rated 5 out of 5 by from Great Filter! Works well! I have had the Aquasana shower filter head with replaceable filters for many years now. I am very pleased and recently signed up for the auto renew for my filters. I feel that the quality of the water when I shower is better and experience the difference,
Date published: 2018-04-11
Rated 5 out of 5 by from Does the job as I desired We have used this shower head with yearly filter replacement for many years. Before we started using this filter, our shower showed an orange color residue in corners & edges. Possibly from old pipes. Since using Aquasana, no orang residue & a shower stayed clean!
Date published: 2018-04-10
Rated 5 out of 5 by from Made a differance This is our second one, we were undecided what to do because the water here in Sun City is horrible. We use to have to scrub our shower more then once a week and our shower curtain would just get stiff from all the bad chemicals in the water. This filter has made a big impact and will continue to use them
Date published: 2018-03-21
Rated 5 out of 5 by from I have been using this filter for a number of year I have used this filter for years, easy to change and does a great job, you can feel the water has a different feel by taking the bad stuff out.
Date published: 2018-03-08
Rated 5 out of 5 by from AWESOME!!!! Easy to install. Shower rain is stronger than before. I did buy some Teflon to ensure that there would not be any leaks. So far everything works perfectly. My sister has already purchased hers.
Date published: 2018-03-07
Rated 5 out of 5 by from I love the features looks great. I purchase this a couple of weeks ago but it leaks when I connect my own shower head to it. Other than that I love this product, I will try to workout the leak. Over all keep up the good work, I'm unable to send pictures of unit due to low memory of cellphone.
Date published: 2018-03-07
Rated 5 out of 5 by from quick install for long lasting relief this shower filter is quick to install than others filters I have try and from the first my skin and hair have shown much improvement.
Date published: 2018-02-23
Rated 5 out of 5 by from No more tangles! I love my Aquasana shower water filter. My hair is softer and less tangled. L.A.’s hard water had been ruining my hair. Thanks Aquasana.
Date published: 2017-12-25
Rated 5 out of 5 by from Easy to install; works great! This is my second filter from Aquasana. I have been very happy with them.
Date published: 2017-12-18
Rated 5 out of 5 by from great product I have been usung the shower filter for over 6 years I I love it!
Date published: 2017-12-04
  • y_2018, m_4, d_26, h_6
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_184, tr_1761
  • loc_en_US, sid_7, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getReviews, 12.38ms
  • 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

Are the replacement shower filters interchangeable with the shower filter without a shower head and the with a shower head. I would like to buy both shower filters if the replacement filter will work in both shower assemblies.

Asked by: Donovan
Absolutely! We only have one style of shower filter. We simply offer several options for your shower head. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2018-04-06

Where does the old filter go once replaced? Can it be recycled.

Asked by: Gomelmeier
We have designed this system to minimize the environmental impact of our replacement elements, which are over 95% biodegradable carbon. Our company will recycle the filters for you, but we do not cover the shipping cost to return the filters back to us. In reality, the environmental impact of shipping the filters back to us outweighs the good of recycling. Since the shower filter is made of a hard plastic that makes accessing the carbon very difficult,you will need to recycle the entire piece. Just check with your city, and as long as they accept polypropylene, you can just put the filter in your normal recycling bin. Thank you, Aquasana
Answered by: Aquasana Customer Support
Date published: 2018-01-17

I'm trying to take the old filter off and it won't budge. Any sugesstions to remove it would be appreciated.

Asked by: Celeste
We found that hard water build up made it difficult to remove the filter so we ran it under hot tap water which allowed us to loosen it. You may also want to soak it in water and white vinegar to help dissolve the mineral build up.
Answered by: Sunset
Date published: 2018-03-11

what's the item or part # for the shower filter replacement that removes chloramines?

Asked by: kj07
This shower filter will remove chlorine or chloramines. Due to the harsh nature of chloramines, it takes more media power to remove them. Due to this, you may just need to replace the filter more often.
Answered by: Aquasana Customer Support
Date published: 2018-01-21

Lab report ?

Asked by: Trucker
You can view any of our Aquasana performance data sheets at www.aquasana.com/performance. For this specific product, you can visit this link to view the PDF: http://cdn.aquasana.com/assets/660-UL-FAC-R1.pdf. Please let us know if you have any additional questions!
Answered by: Aquasana Customer Support
Date published: 2018-01-11

What is the approximate size of this filter cartridge?

Asked by: Beegirl
6" tall, 2 1/2" x3 1/2" - for the filter only. The cap adds another 2 1/4" to the height.
Answered by: Winelover
Date published: 2018-01-09

I have had the shower replacement for about two years now and never replaced the filter. Do you suggest I get the whole thing new again or just buy replacement? 

Asked by: Erikas137
Hello! You should be able to just replace the shower filter itself. If you have any questions or concerns feel free to give us a call at 866.662.6885 and we will be happy to help! Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2017-12-05

Does this filter reduce the iron content of the filtered water

Asked by: arthur121340
I have not check the iron content of my water since installing the Aquasana filters, but as far as I am concerned after researching other systems, this is the best you can get. I am very happy with the filters and the service provided is excellent. I also like the fact that the water doesn't taste filtered, and that the filters can be sent automatically for a cheaper price!
Answered by: Winelover
Date published: 2017-12-01
  • y_2018, m_4, d_26, h_6CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_22
  • loc_en_US, sid_7, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_aquasanaserviceteam
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 18.6ms
  • QUESTIONS, PRODUCT