

Universal Whole House Filter or Undersink Reverse Osmosis RO Replacement Set of 18 filter cartridges: Sediment, GAC, CTO Carbon Block. 3 Year Supply. Free Shipping.
$99.00
- Description
- Additional information
- Reviews (2)
Description

3-Stage Replacement Filter Set – Sediment + GAC + Carbon Block (18 Cartridges Total)
This 3-Stage Replacement Filter Set includes a total of
18 filter cartridges (6 of each type), designed for use in
undersink reverse osmosis (RO) systems and
whole house filtration systems with 3/4″ Port that utilize standard 10″ slim cartridges.
The set provides complete multi-stage filtration to help reduce sediment, chlorine,
chloramine, VOCs, and improve overall water taste and odor.
Stage 1 – 5 Micron Sediment Filter
Size: 9 7/8″ × 2.5″
Removes dirt, silt, sand, rust, and scale particles. This pre-filter protects downstream
carbon filters and helps extend the life of the overall filtration system.
Purpose: Use as the first stage in undersink RO systems and whole house filters.
- Micron Rating (Nominal): 5 Micron
- Operating Temperature: 36°F – 100°F
- Maximum Flow Rate: up to 8 GPM
- Maximum Pressure: 100 PSI
- Quantity: 6 cartridges
Stage 2 – GAC Granular Activated Carbon Filter
Size: 9 7/8″ × 2.5″
Effectively reduces chlorine, chloramine, VOCs, and improves unpleasant taste and odor.
Granular activated carbon provides high adsorption capacity and consistent performance.
Purpose: Use as the second stage in undersink RO or whole house filtration systems.
- Micron Rating: Not rated (GAC media)
- Operating Temperature: 36°F – 100°F
- Maximum Flow Rate: up to 8 GPM
- Maximum Pressure: 100 PSI
- Quantity: 6 cartridges
Stage 3 – Carbon Block Filter
Size: 9 7/8″ × 2.5″
Provides fine carbon filtration to further reduce chlorine, chloramine, VOCs,
and improve taste and odor for clean, great-tasting water.
Purpose: Use as the third stage in undersink RO or whole house filtration systems.
- Micron Rating (Nominal): 10 Micron
- Operating Temperature: 36°F – 100°F
- Maximum Flow Rate: up to 8 GPM
- Maximum Pressure: 100 PSI
- Quantity: 6 cartridges
Key Benefits
- Complete 3-stage replacement filter set (18 cartridges total)
- Good for 6 replacements
- Improves water taste, odor, and clarity
- Helps protect plumbing, fixtures, and appliances
- Standard 10″ slim cartridge size (9 7/8″ × 2.5″)
- Compatible with many undersink RO and whole house systems
Compatibility
- Fits most systems using standard 10″ × 2.5″ filter housings
- Suitable for undersink RO systems and whole house filtration setups
Maintenance
- Typical replacement interval: every 6–12 months per stage, depending on water quality and usage
- Replace sooner if pressure drop or reduced filtration performance is observed
Brand: Aqua / MyWaterClub
SKU: 3UF18
ASIN: B01J34R5O2
Additional information
| Weight | 240 oz |
|---|---|
| Dimensions | 14 × 10 × 10 in |
| Brands | Aqua |


















Nicholas K. –
Easy to installed, no leakage, water tasted great.
Jeremy –
These filters do a great job of removing whatever causes water to taste bad