Skip to content

End-of-Summer Clearance Sale! Save on Our Most Popular Products! Shop Now!

Subscribe & Save: Save Up to Extra 10% on Replacement Filters Subscription Orders

Free Shipping on Orders $49+

Reverse Osmosis
- Undersink Systems
- Countertop Systems
Ultimate Series - US Made Filters

AIO Countertop RO System with UV
Water Filtration
- Undersink
- CuZn
Whole House
Hydro Express Water Softener
Filters
US Made Filters
Parts
2-in-1 Kitchen Faucets
Sale
- Promotions
- Clearance
Resources
Contact Us

Open search Open account page Open cart

Contact Us
My Account

View All Residential RO Systems

RO System Ultimate Series Nav Menu

Ultimate Series - US Made Filters

AIO Countertop RO System with UV

Undersink
CuZn

Car Wash System
View All

water softener navigation menu featured

Hydro Express Water Softener

View All

2 in 1 kitchen ro faucet featured

2-in-1 Kitchen Faucets

Promotions
Clearance

About APEC Water
Careers
FAQs
Help Center
Product Manual
Refer a Friend
Rewards
Water Education
Which System Is Right For You?

Tankless Series
Ultimate Series
Essence Series
View All

Chilled All-In-One
Portable All-In-One
Ultimate Series - Faucet Connection Only
View All

Salt-Based Water Softener
Salt-Free Water Conditioner
View All

Chlorine, Chemical and Odor removal
Iron Removal
View All

Multi-Stage Whole House
Dual Tanks
Total Solution Combos
View All

Single Filters
Filter Sets
View All

Single Filters
Filter Sets
View All

Non-RO Water Filtration Filters
Specialty Filters
Replacement Media
Commercial RO System Replacement Filters

Tanks
Pumps
Leak Detectors
Reverse Osmosis Filter Housings
O-Rings
Fittings
Reverse Osmosis UV
View All

Basic Whole House Systems
Basic Whole House Filter Housings
Heavy Duty Whole House Systems
View All

Smart Leak Detector
Sparkling Water Maker
Test Kits
Water Cooler Parts
View All

Premium 2-In-1 Pull-Down Faucets
Premium Grade Dual Temperature
View All

0

Your cart is empty

Continue shopping

Under Sink Water Filtration Systems 3 stage

Filters

Sort by

Featured

Most relevant

Best selling

Alphabetically, A-Z

Alphabetically, Z-A

Price, low to high

Price, high to low

Date, old to new

Date, new to old

Sort by:

1 product

WFS-1000 - Super Capacity Premium Quality 3 Stage Water Filtration System

WFS-1000 - Super Capacity Premium Quality 3 Stage Water Filtration System

Sale price$170.99 USD

Shop

Filters
Parts
Promotions
Reverse Osmosis Systems
Water Filters
Whole House Systems

About

About APEC
Accessibility Statement
APEC Charity Program
Careers
Cookie Preferences
Customer Testimonials
Privacy Policy
Shipping & Returns
Terms & Conditions
Water Resources

Customer Service

APEC Affiliate
Contact Us
Contaminants List
FAQs
Help Center
Product Manual
Installation Videos
My Account
RO Technical Center
Warranty Registration
Whole House Knowledge Base

© 2026, APEC WATER.