Salt-Free Water Conditioner Replacement

This is the replacement cartridge for the 6 month SLOW PHOS salt-free conditioner (EQ-SS20). Does not replace the 2 year SCM or NAC salt-free conditioners for tankless water heaters.

SimplySoft Salt-Free Water Softener Replacement is rated 4.1 out of 5 by 41.
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  • MSRP: 99.99

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Aquasana Salt-Free Technology This technology will not demineralize your water by chemically removing minerals from your water nor will it put excess salt waste into our environment.

Gently and naturally conditions water using innovative salt-free water conditioning SLOW PHOS technology designed to prevent scale formation and protect from corrosion.

Easy replacement of water conditioner cartridges without the need for a plumber. Cartridges need to be replaced every six months or 50,000 gallons.

If you are looking for the replacement cartridge for the EQ-AS20 2 year SCM or NAC salt-free conditioners for tankless water heaters, please click here.

If you are looking for the replacement tank for the EQ-AST-WH 6 year SCM or NAC salt-free whole house conditioners, please click here.

SLOW PHOS Salt-Free Technology

Aquasana uses innovative SLOW PHOS salt-free water conditioning technology to naturally descale your water and protect your pipes from corrosion without the use of added sodium. As its name implies, SLOW PHOS uses food grade polyphosphate beads engineered to dissolve at a controlled (or "slow") concentration to effectively target scale producing hard mineral carbonate crystals including calcium, magnesium, and barium (Ca, Mg, and Ba). SLOW PHOS technology works by altering the ionic charge of these carbonate crystals to reduce their attraction to one another in your water. By altering their ionic charge, hard minerals will no longer clump or pack together and create scale (Ca, Mg, and Ba buildup). In addition, SLOW PHOS phosphates act as a protective barrier in your plumbing to protect from pipe corrosion. Unlike salt-based water softeners, Aquasana SLOW PHOS technology will not demineralize your water nor will it negatively affect the environment by adding excessive amounts of sodium into our communal water system.

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Read the Reviews

Rated 5 out of 5 by from Just replaced my SS Water softner filter.... I am brand new to Aquasana and changing filters....I like the instructions that come with all the different filters, makes it easy to change them.
Date published: 2016-04-05
Rated 5 out of 5 by from Just replaced my SS Water softner filter.... I am brand new to Aquasana and changing filters....I like the instructions that come with all the different filters, makes it easy to change them.
Date published: 2016-04-05
Rated 5 out of 5 by from Great product Thank you!
Date published: 2016-03-10
Rated 5 out of 5 by from Great product for softening water Easy to clean , easy to replace . Love that you have the replacement come every 6 months so I don't have to worry about forgetting to order a new one .
Date published: 2015-05-08
Rated 5 out of 5 by from Great product for softening water Easy to clean , easy to replace . Love that you have the replacement come every 6 months so I don't have to worry about forgetting to order a new one .
Date published: 2015-05-08
Rated 5 out of 5 by from Great products The effect on water mineral content, clarity, smell and taste is instantaneous and profound. No more bottled water and no more spots on the dishes coming out of the dishwasher.
Date published: 2014-12-14
Rated 5 out of 5 by from Great products The effect on water mineral content, clarity, smell and taste is instantaneous and profound. No more bottled water and no more spots on the dishes coming out of the dishwasher.
Date published: 2014-12-14
Rated 4 out of 5 by from I will buy this product again. improve water drinking taste, and whole house water used as well.
Date published: 2016-09-07
Rated 4 out of 5 by from I will buy this product again. improve water drinking taste, and whole house water used as well.
Date published: 2016-09-07
Rated 4 out of 5 by from Saved our water! I purchased the Aquasana Simply Soft Water Filter to enhance the quality of our well water. The filter is effective in removing the minerals from the water output for several months. The filter, after use of several months, restricts water flow and pressure. However, the cost of the replacement filter is prohibitive to replacement as often as needed.
Date published: 2016-06-11
Rated 4 out of 5 by from Saved our water! I purchased the Aquasana Simply Soft Water Filter to enhance the quality of our well water. The filter is effective in removing the minerals from the water output for several months. The filter, after use of several months, restricts water flow and pressure. However, the cost of the replacement filter is prohibitive to replacement as often as needed.
Date published: 2016-06-11
Rated 4 out of 5 by from Must Have For Hard Water Its great to be able to shower or bathe knowing your hard water has been conditioned so your skin doesn't have to be dry and itchy.
Date published: 2015-12-06
Rated 4 out of 5 by from Must Have For Hard Water Its great to be able to shower or bathe knowing your hard water has been conditioned so your skin doesn't have to be dry and itchy.
Date published: 2015-12-06
Rated 4 out of 5 by from Does everything it is supposed to We have been able to use our water
Date published: 2015-06-27
Rated 4 out of 5 by from Does good job better than softner for my Filter change would be easier if there was a drain at bottom of canister.
Date published: 2014-11-25
Rated 4 out of 5 by from Does good job better than softner for my Filter change would be easier if there was a drain at bottom of canister.
Date published: 2014-11-25
Rated 4 out of 5 by from Salt free water softener No easy to get the connections to stop leaking at filter head. Supplied quick disconnect not at Canadian standards, need to purchase more then installs to canadian plumbing. Does what it promisses for the rating it is effective at. Water was deffinetly softer.
Date published: 2014-10-29
Rated 4 out of 5 by from Salt free water softener No easy to get the connections to stop leaking at filter head. Supplied quick disconnect not at Canadian standards, need to purchase more then installs to canadian plumbing. Does what it promisses for the rating it is effective at. Water was deffinetly softer.
Date published: 2014-10-29
Rated 4 out of 5 by from Water softener Does what it claims had it 2 months no issues. Was not easy to get it to stop leaking at the water connections.
Date published: 2013-12-09
Rated 3 out of 5 by from Doesn't perform as I had hoped it would I like not having to haul salt bags down the steps, but this salt free softener doesn't seem to soften the water like water softener's that use salt do. I still get hard water stains on sinks and tubs. Maybe my water is too hard for this type of system. It's better than no conditioner, but it doesn't perform like I hoped it would.
Date published: 2016-02-19
Rated 3 out of 5 by from Doesn't perform as I had hoped it would I like not having to haul salt bags down the steps, but this salt free softener doesn't seem to soften the water like water softener's that use salt do. I still get hard water stains on sinks and tubs. Maybe my water is too hard for this type of system. It's better than no conditioner, but it doesn't perform like I hoped it would.
Date published: 2016-02-19
Rated 3 out of 5 by from Ring around the bathtub Still leaves scum in bathtub
Date published: 2015-06-20
Rated 3 out of 5 by from Not as good as salt-based system I was excited to find a system that I could install in an apartment. I had a salt based system in my home, so we were not used to hard water and needed to get one in ASAP.|A had to re-do the threaded connections at the filter since this tended to leak a bit. Use a LOT of TEFLON if you don't want to cut pipe again.|Have it in service almost a month now and still waiting for the softness. Wife just
Date published: 2015-02-23
Rated 2 out of 5 by from service: I feel Aqua Sana should have a local service affili read below
Date published: 2017-06-04
Rated 1 out of 5 by from Not a great System overall. We cannot tell if the simply soft does anything at all. Since having our whole house aquasana it certainly is taking care of the chlorine and some other things but it has left us with horrible sulfur smelling water. We have no idea why this is, but have been very disappointed with the system overall. We change the filters regularly as we are supposed to, we flush the lines with city water from time to time, yet the water is just not right. We are so disappointed.
Date published: 2017-09-21
Rated 1 out of 5 by from housing crack The filter has developed the 3" crack in housing after 3 months of use. I had to order replacement from Amazon.
Date published: 2017-08-26
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User Q & A

What is the process of replacement for the water softner system? How many do you need to buy a year, etc? Other costs??

Asked by: Laurel
Hello, this small simplysoft cartridge is housed in the same canister that a 20 inch pre filter would be kept in. You simply release the pressure form your system, unscrew the canister and replace the cartridge. Each cartridges is good for 6-12 months depending on your water quality and usage. Thank you, Aquasana Customer Support
Answered by: Aquasana Customer Support
Date published: 2019-06-22

I have a EQ -400 whole house system. Please tell me what kind of softener I need to buy to replace the old one that I have been using more than a year. Thank you.

Asked by: Blue Bird

can i use the replacement filter in any 20" housing ? or is the filter special made for just this one ?

Asked by: 552 mark

what filter goes to Aquasana THD-AS20?

Asked by: Anonymous

What is the gallons per minute flow rate?

Asked by: Jeannie

if there is still material in the cartridge when pull it to replace should I reinstall and continue using it until all the material hs bee used? The cartridge I just removed has 15 or 20% left Thanks 

Asked by: zeke
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