Description
Overview
UV lamps need to be swapped regularly to keep the steriliser working as it should. This 55W, 550mm UV lamp is a direct replacement for Davey Steriflo and Aquashield Max systems, including the XL60, UV50, and UV70 models. It uses a clip-type connection and is made to match the original Davey part GPH550N2. Replacing the lamp on time helps make sure your water continues to get full UV exposure for safe, bacteria-free drinking.
Key Features
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Direct replacement for Davey Steriflo and Aquashield Max UV systems.
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Compatible with Davey models: XL60, UV50, UV70.
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Matches original Davey part code GPH550N2.
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Lamp length: 550mm.
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Lamp wattage: 55W.
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Pin type: clip style connection.
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UV-C germicidal lamp for water disinfection.
Where It’s Used
These lamps are used in Davey Steriflo and Aquashield Max units installed in rural homes, lifestyle blocks, or commercial sites. They are designed to keep untreated tank water or bore supplies safe to drink without the need for chemicals.
When to Replace
A UV lamp does not stay effective just because it is glowing. The germ-killing strength fades slowly, and after a year of constant use, it is usually too weak to do the job properly. Davey, along with most other UV suppliers, recommends changing the lamp once every 12 months. Leave it in longer and you risk water slipping through without enough UV exposure.
Installation Notes
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Turn off the power and unplug the unit before opening the UV chamber.
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Wear clean gloves or use a soft cloth when handling the lamp to avoid fingerprints or smudges.
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Slide the old lamp out carefully, then clip the new one into place until it sits firmly.
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Power the system back on and check that the lamp starts up properly.
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If you are not confident working with UV gear, get a plumber or technician to do the swap.
Pro Tip
Change the lamp at the same time each year and set a reminder. Many users tie it in with annual water tank cleaning or filter changes to keep the system running smoothly.
FAQs
1. Which systems does this lamp fit?
It fits Davey Steriflo XL60, UV50, UV70, and Aquashield Max UV50/UV70 models. It is a replacement for part number GPH550N2.
2. How long will the lamp last?
On average, about 9,000 hours of operation, which is roughly one year of continuous use.
3. What wattage and length is this lamp?
It is a 55W lamp measuring 550mm in length.
4. Is this product just the lamp?
Yes. This is the UV lamp only. If your quartz sleeve is cracked, cloudy, or scaled, replace that at the same time.
5. Do I need tools to replace it?
No special tools are required. Clip out the old lamp, insert the new one, and power the system back up.