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.

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APEC Water Filter-Set Replacement RO Filter Set, Stage 1, 2 & 3, US Made | For APEC Ultimate Series, 3-Stage Set Includes Sediment and Carbon Block, Removes Chlorine, Dust, and Rust

APEC Water Filter-Set Replacement RO Filter Set, Stage 1, 2 & 3, US Made | For APEC Ultimate Series, 3-Stage Set Includes Sediment and Carbon Block, Removes Chlorine, Dust, and Rust

Product ID: 5485476

Details

Brand
APEC WATER
Included Components
FILTER-SET
Installation Type
Under Sink
Item Weight
2 pounds
Material
Carbon
Model Name
FILTER-SET

⏳12+ months filter life

🛡️3-stage multi-filtration

🇺🇸100% US made quality

HK$810

Duties & taxes included

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Description

💧 Elevate your water game with APEC’s ultimate triple-filter power!

MADE IN THE USA - Premium components crafted for durability and trust
EXTENDED FILTER LIFE - Over 12 months of high-performance filtration with fewer replacements
TRIPLE STAGE DEFENSE - Sediment + dual carbon blocks for superior impurity removal
UNIVERSAL COMPATIBILITY - Fits all standard 10" under-sink RO systems including APEC Ultimate Series
ADVANCED CARBON BLOCK TECH - Extruded carbon blocks outperform GAC filters—no carbon fines, no bypass

The APEC Water Filter-Set Replacement RO Filter Set is a US-made, 3-stage filtration system designed for APEC Ultimate Series and all standard 10" reverse osmosis systems. Featuring a high-capacity polypropylene sediment filter and two extruded carbon block filters, it effectively removes dust, rust, chlorine, odors, and VOCs. Engineered for durability, this filter set lasts over 12 months, ensuring cleaner, better-tasting water with fewer replacements.

Specifications

ASIN	B00HV128WY
Best Sellers Rank	#3,117 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #22 in Replacement Under-Sink Water Filters
Brand Name	APEC WATER
Customer Reviews	4.7 4.7 out of 5 stars (2,550)
Global Trade Identification Number	00854961005044
Included Components	FILTER-SET
Installation Type	Under Sink
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
Material Type	Carbon,Polypropylene
Model Name	FILTER-SET
Model Number	FILTER-SET
Other Special Features of the Product	Multi Stage Filtrartion
Part Number	FILTER-SET
Power Source	Hydraulic-powered
Purification Method	Reverse Osmosis
UPC	854961005044
Unit Count	1 Count

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