Whole House Post-filter Cartridge Replacement

The post-filter, considered a polishing agent, reduces any remaining sediment and organic particles. This cartridge should be replaced every 6-12 months.

Whole House Post-filter Cartridge Replacement is rated 4.3 out of 5 by 146.
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  • MSRP: 29.95

Questions? We can help

  • 866-662-6885
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This post-filter replacement cartridge can be used with Rhino Whole House Water Filters that contain a post-filter.

The post-filter reduces any remaining sediment and organic particles. The addition of this post-filter is considered a polishing agent to the filtration process. This cartridge should be replaced every 6-12 months.

Download replacement instructions here

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Read the Reviews

Rated 5 out of 5 by from Product arrived as promised. Easy to install. Filter system including this filter has performed very well. The rust and iron have been removed and the egg like odor of the water is gone as well.
Date published: 2018-04-29
Rated 5 out of 5 by from gets rid of all the bad stuff seems effective for getting impurities and bad taste out of water.
Date published: 2018-04-04
Rated 5 out of 5 by from Great Results! I purchased and installed the EQ-1000 filter a couple weeks ago and have enjoyed good, clean water ever since! I was able to install it myself, which was fairly time consuming, but not too difficult. After waiting a day or two to let the new water get through our pipes, we compared our new purified water to both our old unfiltered water and store bought water, and WOW what a difference! We could immediately taste the difference between the new and old water, and the new water was indistinguishable from the purified store bought water. We are extremely satisfied with the performance of this unit, and would definitely recommend it, provided the filters hold up as long as they say they should.
Date published: 2018-04-02
Rated 5 out of 5 by from Water tastes great! This post filter cartridge unit was for routine replacement. We purchased a whole house unit including the softener over a year ago. Prior to installation, our water had a slight taste and odor similar to algae and white scale built up on fixtures quickly. The units have made a world of difference. The water tastes as good as any bottled water on the market and we no longer have to buy purified water for appliances. We installed a dual system side by side and have no problems with flow rate, even when running the washing machine and showering at the same time. I highly recommend the dual unit if you have reasonably high demand. We temporarily ran with one side turned off and the the difference in water pressure while showering was noticeable - especially if water was being used elsewhere in the house. I also recommend a drip plan underneath to catch water in the event you have a leak at the fitting and during filter maintenance.
Date published: 2018-03-21
Rated 5 out of 5 by from Great All good as usual. I got a leak when I replaced the filter but after reading the instructions I found the missing o-ring on the floor & everything was fine again after I put it back in. How silly of me :)
Date published: 2018-02-27
Rated 5 out of 5 by from Love our Aquasana Whole house Filter We live about 35 miles from town. Our well water comes from the lake we live on but for as long as I can remember my family has never had the water filtered and no one would drink the well water and barely bathed in it. We used Bottled water to drink and the tubs always had hard water stains as well as rust in them. When my wife and I took over the family lake home 4 years ago we bought your Aquasana water system and WOW. The water smelled good clear clean no rust no bad taste you can actually drink it. We love it!!!
Date published: 2018-02-16
Rated 5 out of 5 by from great value We've had a month and we are very pleased with it. We can now drink the water from the tap
Date published: 2018-02-16
Rated 5 out of 5 by from great system I have used Aquasana products in the past and very happy.
Date published: 2018-02-12
Rated 5 out of 5 by from Easy purchase The website makes it easy to purchase replacement filters and prices are reasonable.
Date published: 2017-12-29
Rated 5 out of 5 by from Regular maintenance Easy to install the new filter. Makes the pressure and flow back to normal
Date published: 2017-12-25
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User Q & A

Is the the correct post filter for the Aquasana 10 year, 1M gallons I purchased in Feb 2017?

Asked by: Twillet
Hello Twillet, Yes, this is the correct filter. Please let us know if we can further assist. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-11-07

Is it good for the EQ600? How often do we have to change this cartridge?

Asked by: Anonymous
I believe this filter works very well. We try to change ours about once every 2 to 3 months, however we have a well with lots of rust build up.
Answered by: CandyRay
Date published: 2019-10-28

Please can you confirm micron ratings for filters.

Asked by: Richard the water enthusu
Hello, This is a .35 micron post filter for the whole home filtration system. Thank you, -Aquasana Support
Answered by: Aquasana S
Date published: 2019-10-01

You have a blue post filter now instead of the red & it does not work the same... my water wreaks of rotten eggs. Other people are saying the same thing about the new filter. Are you going to fix this problem? Support is not answering these questions.

Asked by: waterquestions
We understand your concern! We officially transitioned from the old post filter cartridges (purple caps) to the new post filter cartridges (blue caps) in May 2019. The new filter is from the same vendor and preforms the same as the old filter, there are just some visual differences. The Pre and Post-Filters filters do not produce a taste or smell. Kindly keep in mind these filters only purpose is to capture any rust, silt or sediment in the water. Feel free to reach out for any questions concerning the change. Our team members are available 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: 2019-09-25

i dont understand why this filter is so expensive. please explain.

Asked by: fred with?
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: 2019-10-23

Is this the 10 inch post replacement filter?

Asked by: Myrtle Beach G.P.
Hello, Thank you for your question. This is our post filter, if you are referring to the 10" pre filter I have provided a link down below. https://www.aquasana.com/replacement-whole-house-filters/10in-pre-filter-4-pack Thank you! -Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-21

Hello I need a replacement filter for a dirt hog dh20-20. Thank you

Asked by: Waterboy3605
Hello, Please contact us at 866-662-6885 to help further assist on helping place an order for your filters. Thank you! Aquasana Support
Answered by: Aquasana S
Date published: 2019-09-21

I have the whole home filter with pre and post filter.  The post filter turns black within a day of installing.  Is this normal ?  The prefilter is ok, it’s still white.  Why does it turn black so soon ? 

Asked by: Ann ha
I've had a similar problem with the post filter turning black and a black powdery substance attaching below the waterline in the toilets. My EQ-1000 was professionally installed on 02/18/2019 and the carbon fines started appearing within a month. In my case it was a faulty carbon filter that seemed to be slowly disintegrating into what Aquasana calls "fines". A Support Rep recommended I disconnect the large carbon filter and re-flush it. In my case it didn't help. Finally, after sending photos of the blackened toilet bowls, Aquasana sent a replacement carbon filter which I just finished flushing and installing. Too soon to tell if the issue is resolved, but I believe the new filter should do the trick.....fingers crossed.
Answered by: Jim876
Date published: 2019-09-07
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