CTO Carbon Block Cartridge
WP-20CTO
20 × 4.5 in
Taste & odor
E20T / S20T / V20T / V20TC
Replacement Carbon Block Filter Cartridge
Selected part: WP-20CTO carbon block cartridge
Compatible Glonyx systems
Match the WP-20CTO 20 × 4.5-inch format and carbon-stage position before ordering.
Product details
Specifications, Fit & What's Included
Key dimensions, system fit, and box contents at a glance—so you can choose the replacement part that matches your Glonyx setup.
Key Specifications
| Part reference | WP-20CTO |
|---|---|
| Filter type | CTO carbon block cartridge |
| Size | 20 × 4.5 in Big Blue format |
| Helps with | Chlorine-related taste and odor |
| Fits Glonyx systems | GX-WP-E20T, GX-WP-S20T, GX-WP-V20T, and GX-WP-V20TC |
| Retail package | 1 cartridge |
Made to Fit
Fits the 20 × 4.5 in carbon stage in Glonyx GX-WP-E20T, GX-WP-S20T, GX-WP-V20T, and GX-WP-V20TC whole-house systems.
Quick Fit Check
Look for a 20 × 4.5 in carbon stage and match the WP-20CTO reference before checkout.
What's Included
1 WP-20CTO replacement carbon block cartridge.
Helps improve chlorine-related taste and odor.
20 × 4.5 in Big Blue replacement format.
Replacement timing varies with water quality and household use.
Need help matching it? Send us a photo of your system label and current cartridge.
Compatibility & service
Match the original part before checkout
For the carbon stage, confirm the system model, 20 × 4.5-inch format, and cartridge reference before ordering.
Carbon block for taste and odor support
The WP-20CTO carbon block helps reduce chlorine-related taste and odor in the designated stage of compatible Glonyx systems.
What to match
- Confirm GX-WP-E20T, GX-WP-S20T, GX-WP-V20T, or GX-WP-V20TC with a designated 20 × 4.5-inch carbon stage.
- Match the WP-20CTO reference, stage order, flow direction, and end configuration.
- Use the cartridge only in the designated carbon position.
Before replacement
- Follow the system shutdown instructions: disconnect power to connected equipment, shut off the water supply, and depressurize the housing.
- Clean the housing, inspect the O-ring, install in the designated carbon position, and flush before normal use.
- Restore service slowly and verify normal operation and leak-free sealing.
Not certain this is the correct part?
Send the system label, cartridge label, dimensions, and one housing photo before ordering.
Find your complete Glonyx system
For the 20 × 4.5-inch carbon stage in V20T, E20T and S20T systems.
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Replacement Carbon Block Filter Cartridge
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Product support
Frequently asked questions
1Which systems are confirmed for this carbon block?
The confirmed applications are GX-WP-E20T, GX-WP-S20T, GX-WP-V20T, and GX-WP-V20TC systems configured with a WP-20CTO 20 × 4.5 in carbon stage.
2Is GX-WP-E20T a confirmed fit?
Yes. GX-WP-E20T includes PP sediment filtration, a 20 × 4.5 in carbon block stage, and UV treatment. WP-20CTO fits its designated carbon stage.
3What does the CTO cartridge address?
It is intended to improve chlorine-related taste and odor. It is not a sediment filter, softener, scale-control device, RO membrane, or microbiological treatment stage.
4What warranty applies to replacement parts?
Separately sold Glonyx replacement parts and accessories carry a 1-year limited warranty against verified defects in materials or workmanship. Normal wear, consumable depletion, incorrect matching, and improper installation are not product defects.
5How many cartridges are included?
The retail listing is for one cartridge.