---
product_id: 5485476
title: "APEC Water Systems ULTIMATE Series US Made Stage 1, 2 & 3 Replacement Filter For Undersink System(FILTER-SET)"
brand: "apec water"
price: "₨1827"
currency: SCR
in_stock: true
reviews_count: 13
category: "Apec Water"
url: https://www.desertcart.sc/products/5485476-apec-water-systems-ultimate-series-us-made-stage-1-2
store_origin: SC
region: Seychelles
---

# 12+ months filter lifespan 3-stage advanced filtration 100% USA-made quality APEC Water Systems ULTIMATE Series US Made Stage 1, 2 & 3 Replacement Filter For Undersink System(FILTER-SET)

**Brand:** apec water
**Price:** ₨1827
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with the ultimate filter upgrade!

## Quick Answers

- **What is this?** APEC Water Systems ULTIMATE Series US Made Stage 1, 2 & 3 Replacement Filter For Undersink System(FILTER-SET) by apec water
- **How much does it cost?** ₨1827 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/5485476-apec-water-systems-ultimate-series-us-made-stage-1-2)

## Best For

- apec water enthusiasts

## Why This Product

- Trusted apec water brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Compatibility:** Fits all standard 10" under-sink RO systems including APEC’s top models
- • **Long-Lasting Performance:** Filters last over 12 months, reducing hassle and replacement frequency
- • **Triple-Stage Purity Shield:** Sediment + dual carbon blocks for unmatched water clarity and taste
- • **Next-Level Carbon Block Tech:** Extruded carbon blocks outperform GAC filters—no carbon fines, no bypass
- • **Made in the USA, Trusted Worldwide:** Premium components crafted domestically for superior reliability

## Overview

The APEC Water Systems ULTIMATE Series FILTER-SET is a premium 3-stage replacement filter set designed for under-sink reverse osmosis systems. Made in the USA, it features a high-capacity polypropylene sediment filter and two extruded carbon block filters that remove sediment, chlorine, odors, and VOCs. Compatible with all standard 10" RO systems, these filters deliver over 12 months of superior water purification, ensuring fresher, cleaner, and better-tasting water with fewer replacements.

## Description

APEC ultimate high capacity pre-filter set is made in USA with high quality filtration components to provide a longer lasting filter set to protect and prolong the lifespan of your reverse osmosis system. Premium quality filter set lasts over 12 months for fewer filter change outs and high performance impurity removal. These standard size filters are 10 inch and compatible with all standard size under counter ro systems. 1St stage: high-grade 10 inch high-capacity polypropylene sediment filter -removes dirt, particles, and rust. 100% pure polypropylene depth filter with exceptional dirt-holding capacity translates to longer life and fewer change-outs than existing string-wound or resin-bonded filters. 2Nd and 3RD stage: premium extruded carbon block 10 inch -gets rid of unpleasant chlorine, tastes, odors, cloudiness and colors. Also removes VOC and other common harmful impurities from the water. Apec's extruded carbon block filters consist of activated carbon particles fused into a uniform block with enhanced adsorptive capacity and efficiency. Unlike granular activated carbon (GAC) filters, these extruded carbon block cartridges will not channel or bypass due to the extreme uniformity of their extruded activated carbon core. Compatible for apec RO-45, RO-90, RO-PERM, RO-PUMP and all other standard size under counter reverse osmosis systems. About apec for over 17 years, apec has been an industry leading manufacturer who specializes in high performance RO Systems. As the original manufacturer, we have dedicated a knowledgeable and sincere team that is committed to providing customer SATISFACTION in hopes to bring many years of enjoyment and good health for you and your family.

Review: Nice quality filters - Been using these MADE IN USA from Apec filters for many years. I use them for an old reverse osmosis unit that I removed the top membrane filter. These three filters work perfectly to make the Las Vegas water more pleasant to drink from my fridge water dispenser. I have a bypass installed so I don't need to buy those expensive fridge filters that don't do much to improve the taste of the water and ice.
Review: Saving, taste and smell - 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.

## Features

- APEC Water ULTIMATE Series FILTER-SET is for RO-45, RO-90, RO-PH90, RO-PERM, RO-PUMP, and compatible with all 10" standard industry reverse osmosis water filter system .
- Includes (1) sediment and (2) carbon block filters to protect and extend the life of the RO system
- 1st stage Polypropylene sediment filter to remove dust, particles, and rust
- 2nd & 3rd stage extruded carbon block filters to remove chlorine, taste & odor
- APEC's extruded solid carbon block filters far surpass GAC filters in performance and absorptive capacity; in addition they do not leak carbon fines.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HV128WY |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #4,979 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #45 in Replacement Under-Sink Water Filters |
| Brand | APEC WATER |
| Color | White |
| Compatible Water Purifier Models | APEC Water Systems RO-45, APEC Water Systems RO-90, APEC Water Systems RO-PERM, APEC Water Systems RO-PH90, APEC Water Systems RO-PUMP, APEC Water Systems WFS-1000 |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,977) |
| Date First Available | January 16, 2014 |
| External Testing Certification | NSF |
| Global Trade Identification Number | 00854961005044 |
| Included Components | FILTER-SET |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 2 pounds |
| Item model number | FILTER-SET |
| Manufacturer | APEC Water Systems |
| Material | Carbon,Polypropylene |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | FILTER-SET |
| Product Benefits | Reduces Sediment |
| Product Dimensions | 9.3"D x 11.5"W x 4.8"H |
| Set Name | ULTIMATE Series |
| Size | 3 Piece Set |
| Style | 3 Filter-Set |
| UPC | 854961005044 |
| Unit Count | 1 Count |

## Product Details

- **External Testing Certification:** NSF
- **Item Weight:** 2 Pounds
- **Material:** Carbon,Polypropylene
- **Product Benefits:** Reduces Sediment
- **Product Dimensions:** 9.3"D x 11.5"W x 4.8"H

## Images

![APEC Water Systems ULTIMATE Series US Made Stage 1, 2 & 3 Replacement Filter For Undersink System(FILTER-SET) - Image 1](https://m.media-amazon.com/images/I/91MA10a2b-L.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: when is time to replace filters, do I have to replace o-rings too??**
A: Hello, the Ultimate FILTER-SET are typically replaced about once a year depending on water quality and usage going through the filters. The O-rings are typically replaced about every 3 years, but it is always good to have them on hand as backups just in case. If you need any help or assistance, feel free to give us a call we are happy to help! Best Regards, APEC Support Team 800-880-4808.

**Q: does this item come with the replacement O-rings too?**
A: The FILTER-SET only includes the replacement filters, it does not include the replacement O-rings.

**Q: will this fit ROES-50 ?**
A: They will fit the ROES-50 and most of the systems that uses industry standard size.

**Q: Will these filter out Cryptosporidia?**
A: Cryptosporidia are 3 t0 4 microns in diameter.  Reverse osmosis filtration membranes have pore sizes around 0.0001 microns.  Work it out for yourself.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice quality filters
*by O***K on December 21, 2025*

Been using these MADE IN USA from Apec filters for many years. I use them for an old reverse osmosis unit that I removed the top membrane filter. These three filters work perfectly to make the Las Vegas water more pleasant to drink from my fridge water dispenser. I have a bypass installed so I don't need to buy those expensive fridge filters that don't do much to improve the taste of the water and ice.

### ⭐⭐⭐⭐⭐ Saving, taste and smell
*by A***R on April 8, 2024*

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.

### ⭐⭐⭐⭐⭐ More effective than any I've tried. DTS reading is only 14 compared to the tap water 310
*by M***B on January 1, 2026*

This brand is a zillion times better than any I've ever used. Best by far. Last longer and water cleaner than using others. I live in Riverside County, Southern Calif.. i have an APEC RO-90 in My kitchen under the sink. I use this water for anything that I drink or eat or cook. Tap in this region is Dangerously toxic in some areas and better in some others. My professional digital TDS&EC water meter reads 310 ppm which is not drinkable for me. It is legally drinkable but contains solids like mercury, arsenic, chlorine, medicines, etc. I'm not a scientist, but am a educated professional. I did a ton of research on personal home kitchen water systems before I purchased this one. It definitely does the best job based on the actual STATS from the most respectable water testing agency in the US. Non-vested interest. These FILTERS are involved in the statistical analysis. For my basic system, these 3 filters are changed every 12 months, or up to 24 months depending on water consumption. The 2 other filters that are used along with this set, include the main membrane filter and one other one. They are changed every 3 to 5 years and are the actual filters that do the BIG magic in detoxifying the water. I couldn't be happier with these filters and system. By the way, I had the water pressure decrease immensely recently. After calling the APEC company I found out that the water tanks are pressurized and commonly lose pressure after some years, diminishing the amount of water flow. It can easily be re-pressurized with a bicycle pump or electric equivalent. See YouTube "RO-90 re-pressurization" . Lots of short demos of many different brands. A professional water system company can also do it, but many don't. I had a handyman watch the video and then repressive for me, as suggested by a company. It took only a few minutes. Easy .

## Frequently Bought Together

- APEC Water Systems ULTIMATE Series US Made Stage 1, 2 & 3 Replacement Filter For Undersink System(FILTER-SET)
- APEC Water Systems Replacement ORing for ROES-50 3.5" OD Reverse Osmosis Water Filter Housings, O-Ring (3 pcs O-Ring-Set-B)
- APEC Water Systems WFS-1000 Super Capacity Premium Quality 3 Stage Under-Sink Water Filter System

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-14*