365-Day Countdown UV Ballast
GX-WP-S20T
365-day timer
33–48 W lamps
G10Q
365-Day Countdown UV Ballast
Selected part: GX-WP-S20T countdown UV controller
Compatible Glonyx systems
Match your GX-WP-S20T system and existing countdown-controller configuration 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
| Controller type | GX-WP-S20T countdown UV controller |
|---|---|
| Input | 100–240 VAC |
| Rated power | 48 W |
| Lamp output | 800 mA |
| Lamp connection | G10Q |
| Lamp range | 33–48 W |
| Controller size | Approx. 4.92 × 2.52 × 1.79 in |
| Operating mode | Constant-on UV operation |
| Display | 365-day lamp-life countdown |
Made to Fit
For matched GX-WP-S20T systems using a constant-on countdown controller with a 33–48 W G10Q lamp.
Quick Fit Check
Confirm the GX-WP-S20T system label, countdown-controller format, lamp wattage, and G10Q connection.
What's Included
1 replacement 365-day countdown UV ballast/controller.
365-day lamp-life countdown makes annual service easy to track.
Constant-on UV operation.
100–240 VAC input for flexible replacement use.
Need help matching it? Send us a photo of the current ballast label.
Compatibility & service
Match the original part before checkout
Replacement parts can look similar while using different electrical ratings, dimensions, connectors, threads, seals, or operating modes.
Constant-on UV with maintenance countdown
The GX-WP-S20T countdown controller keeps the lamp on continuously and counts down 365 days for service planning.
What to match
- Confirm the GX-WP-S20T system model and original countdown-controller label.
- Match the GX-WP-S20T system, input voltage, lamp wattage, G10Q connector, and timer format.
- Use the matched GX-WP-S20T countdown controller; a GX-WP-E20T flow-control ballast is not a substitute.
Before replacement
- Disconnect electrical power and isolate the water supply.
- Depressurize and drain the relevant housing or chamber.
- Restore service slowly and verify normal operation and leak-free sealing.
Not certain this is the correct part?
Send the system label, current part label, dimensions, and one installation photo before ordering.
Find your complete Glonyx system
For a matched GX-WP-S20T countdown-controller configuration. Confirm the original controller label; this version runs continuously and does not use a flow switch.
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365-Day Countdown UV Ballast
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Product support
Frequently asked questions
1Does this ballast use a water flow switch?
No. The GX-WP-S20T countdown controller is intended for constant-on UV lamp operation and uses a 365-day lamp-life countdown.
2What electrical format is confirmed?
The confirmed countdown-controller specification is 100–240 VAC input, 48 W rated power, 800 mA output, a G10Q connection, and a 33–48 W supported lamp range.
3Is the 365-day display a water-quality sensor?
No. It is a maintenance countdown for lamp-life planning, not a water-quality or UV-intensity measurement.
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.
5What must be matched before ordering?
Confirm the GX-WP-S20T system model, original controller label, input voltage, lamp wattage, G10Q connector, and countdown-controller format.