One Integrated System
Sediment, carbon, and UV treatment in one point-of-entry sequence.
Model Number: GX-WP-S20T
Catch sediment, help reduce chlorine taste and odor, and add UV treatment in one whole-house system. S20T brings three serviceable stages together before water branches to your faucets and showers.
Water Treatment
Annual UV Lamp Change
Sediment, carbon, and UV treatment in one point-of-entry sequence.
UV dosage 30 mJ/cm²
UV treatment adds a separate stage after sediment and carbon filtration. It does not remove dissolved minerals.
As water enters your home, it passes through particle and carbon filtration before the final 48W UV stage, then continues to faucets, showers, and water-using appliances.









Includes a S20-B48 ballast with a 365-day service countdown.

Three-stage point-of-entry treatment for the whole home.

5 μm PP sediment and carbon block cartridges.

Follow the lamp replacement schedule specified for your system.

At the stated 30 mJ/cm² UV-dose condition.

Confirm local thread and fitting compatibility.

Listed water-temperature range: 39–99°F.

600 × 675 × 230 mm; allow additional room for installation and service.
Model-specific installation instructions.
Request Installation InstructionsGet help with model-specific installation steps.
Get Installation Support20 × 4.5-inch filter parts: WP-20BB housing, WP-20PP sediment cartridge, and WP-20CTO carbon block.
GX-WP-S20T: 48 W UV lamp and countdown UV controller. Contact support to match the quartz sleeve.
Find replacement partsModel-specific maintenance and service instructions.
Request Maintenance Instructions
Mounted three-stage assembly with two filter housings, pressure gauge, and UV chamber.

5 μm sediment pre-filtration.

Improve the bad taste and odor.


The lamp and protective sleeve for the final UV stage.

UV controller with a 365-day annual service countdown.
Accessories may vary by variant and final package.
It combines sediment filtration, carbon filtration, and UV treatment at the main water line, before water reaches fixtures throughout the home.
The 5 μm PP filter captures visible particles, the carbon block helps reduce chlorine-related taste and odor, and the 48W UV lamp provides the final microbiological treatment stage.
Use the purifier within its rated flow and water-quality limits. Performance depends on water quality, flow, lamp and sleeve condition, and installation.
A built-in 365-day countdown helps you keep track of annual lamp service.
Yes. The UV lamp operates continuously while the system is powered, so the UV stage is ready whenever water is used.
The listed reference is 12 GPM / 45 LPM at 30 mJ/cm². Actual UV performance depends on flow, UVT, turbidity, lamp condition, sleeve condition, and installation.
The system measures 23.6 × 26.6 × 9.1 inches (600 × 675 × 230 mm). Allow additional clearance below the filter housings and around the UV chamber for cartridge, lamp, and quartz-sleeve service.
UV performance depends on inlet conditions such as UV transmittance, turbidity, hardness, iron, and manganese. A current water test helps identify any pretreatment needed before installation.
No. Sediment, carbon, and UV treatment do not remove dissolved hardness minerals or reduce total dissolved solids.
Confirm your water source and test results, peak flow, 1-inch connection compatibility, 10–100 psi operating pressure, installation space, and access to dry, code-compliant power.
Send your water test, peak flow, plumbing size, pressure, and a photo of the planned installation area. We can help check the fit before you order.
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