Description
Replacement UV Lamp GPH900N for Pre-1996 Davey Steriflo SF900 UV System
Keep your older Davey Steriflo SF900 UV system (pre-1996) delivering safe, bacteria-free water with this compatible replacement lamp. Annual replacement is essential — UV output degrades over time even when the lamp still appears to glow.
Compatibility
| Fits UV System | Replaces Part # |
|---|---|
| Davey Steriflo SF900 (pre-1996) | GPH900N |
| Trevoli 55W systems | GPH900N |
Lamp Specifications
- Lamp Length: 925mm
- Wattage: 55W
- Pin Connection Type: Standard Pin (4 Pin)
- Replaces Original Part: GPH900N
Important Note
This lamp is specifically for pre-1996 Davey Steriflo SF900 systems. Later models use a different lamp. Please confirm your system year before ordering.
Why Replace Annually?
UV lamps should be replaced every 12 months regardless of appearance. After one year of operation, UV output drops below the level required to effectively neutralise bacteria, viruses, and protozoa — even if the lamp is still glowing.
How to Replace Your UV Lamp
- Turn off the UV system and disconnect power
- Turn off the water supply
- Allow the lamp to cool for at least 5 minutes
- Carefully remove the old lamp — avoid touching the glass with bare hands
- Insert the new lamp and ensure pins are fully seated
- Reassemble, restore water supply, and power on
- Reset your system's lamp timer if applicable
Matching Glass Sleeve
Also need a replacement quartz glass sleeve? See the compatible glass sleeve for Davey Steriflo SF800 / SF900 / SF940 — available separately.
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