APEC Water Systems ULTIMATE Series US Made Stage 1, 2 & 3 Replacement Filter For Undersink System(FILTER-SET)

what our customer say this product:

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1. Steve R. Verified Buyer – 12 June 2024

   Always use original equipment filters every year. Keeps everything working well.
   

2. Dave P Verified Buyer – 14 December 2024

   They are the correct filters for my APEC system under my kitchen sink. My wife swears it makes the water taste better, but I can’t tell much of a difference. When I change them, they aren’t super dirty, as we have a pre-filter as our first line of defense. That gets a little rust-colored over time, but these always look clean – I just changed them every so often because I feel like I should. They fit fine, seem to work as designed, and I don’t have any complaints.
   

3. karjee cheng Verified Buyer – 28 December 2024

   Used to get this from apecwateroutlet.com US but they are no longer shipping to Singapore. So I am very happy to find it on apecwateroutlet.com SG, and at a reasonable price too.
   

4. Anonymous Verified Buyer – 8 January 2025

   We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.

   

5. Milton Verified Buyer – 19 January 2025

   It was easy to install, good quality, and results in great tasting water, nice faucet with good water flow; fills water bottles quickly. I like that the filters only need to be replaced once every 12 months. I have only had it for a week, but so far very pleased.
   

6. Anonymous Verified Buyer – 20 January 2025

   We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.

   

7. Anonymous Verified Buyer – 3 February 2025

   We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.

   

8. Cameron Verified Buyer – 10 February 2025

   Made in USA, recommended
   

9. Richard Schulze Verified Buyer – 24 February 2025

   Delivery was super fast and these fit perfectly. After you turn the water back on, open your drinking water on if possible but only a drip. Your system will gurgle a bit while all the air is purged out. After the air is gone and the tank is repressurized, the good water flowed great
   

10. Manu Verified Buyer – 17 March 2025

    Not yet use since we still have another.
    

11. Anonymous Verified Buyer – 20 March 2025

    We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.

    

12. Anonymous Verified Buyer – 21 March 2025

    We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.

    

13. Anonymous Verified Buyer – 26 March 2025

    We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.

    

14. Anonymous Verified Buyer – 7 April 2025

    We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.
    

15. Anonymous Verified Buyer – 10 May 2025

    We formally purchased another line of filters for a different under-sink RO system and would spend $200 every 3 months and it required us shutting down our system and purging it for 24 hours. This system can be used within 15 minutes of installing/replacing filters. The water quality is even better. Although the filters do create waste once you dispose, it isn’t in comparison to the hundreds of plastic bottles that create even more waste and hazards. We live in a town where water filtration is subpar and very hard. The drinks you make with our water vs. this filter can’t compare in clarity alone. I only gave it 4 stars for installation due to the fact that most under-sink units aren’t easily accessible and require some maneuvering on floor level, but overall straightforward. We date and mark each filter with the corresponding order of installation to ensure we properly install them and change them out timely. In the pictures you will see a glass of tea, with the same tea concentration, with the same steeping times, same brand. The difference is one on the left is from the tap source no filtration and the one on the right is filtered with APEC. The smell alone was a stark contrast before the clarity and taste was addressed. We used a flashlight to show the murkiness of the one on the left (a) vs. the one on the right (B) in two of the pictures. Just an overall great investment.

    

16. Anonymous Verified Buyer – 14 May 2025

    Great packaging. Easy install. Will buy again!
    

17. Paul P. Verified Buyer – 10 June 2025

    I’ve been getting these filters for years, and the quality has always been consistently top notch… Until now. This last set I got had a noticable drop in quality. Stages 2&3 are a much smaller diameter now, and weigh about half as much. Seems like much less carbon now, so I’m suspicious they won’t last as long as before. Stages 1 seems to be a different (cheaper?) material. The plastic ends are now more brittle, and they arrived shattered (had apecwateroutlet.com send replacement). These at least used to be made in USA, but the obvious corporate penny pinching to raise their profits is sickening! I’m so very disappointed with Apec now, after loving them for years.