when is time to replace filters, do I have to replace o-rings too??

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.

does this item come with the replacement O-rings too?

The FILTER-SET only includes the replacement filters, it does not include the replacement O-rings.

will this fit ROES-50 ?

They will fit the ROES-50 and most of the systems that uses industry standard size.

Will these filter out Cryptosporidia?

Cryptosporidia are 3 t0 4 microns in diameter. Reverse osmosis filtration membranes have pore sizes around 0.0001 microns. Work it out for yourself.

Apec Water Systems Ultimate Series Us Made Stage 1 2

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Description

💧 Elevate your hydration game with the ultimate filter upgrade!

UNIVERSAL COMPATIBILITY - Fits all standard 10" under-sink RO systems including APEC’s top models
LONG LASTING PERFORMANCE - Filters last over 12 months, minimizing maintenance and maximizing convenience
TRIPLE STAGE PURITY SHIELD - Sediment + dual carbon blocks for unmatched water clarity and taste
NEXT LEVEL CARBON BLOCK TECH - Extruded solid carbon blocks outperform GAC filters—no carbon fines, no bypass
MADE IN THE USA TRUSTED WORLDWIDE - Premium components crafted domestically for superior reliability

The APEC Water Systems ULTIMATE Series Replacement Filter Set is a premium 3-stage filtration solution designed for standard 10" 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. Engineered for durability, these filters last over 12 months, ensuring cleaner, better-tasting water with fewer replacements. Compatible with multiple APEC RO models, this set delivers industry-leading performance and reliability for health-conscious professionals seeking superior water quality.

Specifications

ASIN	B00HV128WY
Best Sellers Rank	#4,738 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #38 in Replacement Under-Sink Water Filters
Brand	APEC WATER
Brand Name	APEC WATER
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	4.8 out of 5 stars 2,505 Reviews
External Testing Certification	NSF
Global Trade Identification Number	00854961005044
Included Components	FILTER-SET
Item Dimensions D x W x H	9.3"D x 11.5"W x 4.8"H
Item Type Name	APEC Water Systems FILTER-SET US Made Double Capacity Replacement Stage 1-3 For ULTIMATE Series Reverse Osmosis System
Item Weight	2 Pounds
Manufacturer	APEC Water Systems
Manufacturer Part Number	FILTER-SET
Material	Carbon,Polypropylene
Material Type	Carbon,Polypropylene
Model Number	FILTER-SET
Number of Items	1
Product Benefits	Reduces Sediment
Product Dimensions	9.3"D x 11.5"W x 4.8"H
Set Name	ULTIMATE Series
UPC	854961005044
Unit Count	1 Count

Reviews

S**S

7.04.2026

A**R

8.04.2024

D**S

18.03.2026

O**K

21.12.2025

T**Z

3.11.2025

O**N

8.11.2025

T**Y

15.04.2026

G**E

19.12.2017

M**U

27.07.2024

C**N

10.08.2022

C**N

16.07.2025

K**G

18.04.2020

R**E

3.10.2023

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In stock

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

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