Replacement UV lamps for water steriliser systems, both 840mm in length with a 4-pin even connector, differing mainly in power output. The 40W lamp fits Aquapro, GermicidaLight, HRV, Steriflo and Waterguard sterilisers, while the 80W lamp is built for Steriflo UV130, SF1000, SF2500 and WSI/Waterguard units. Matching your system's model to the correct wattage ensures the UV dose stays at the level your steriliser was designed to deliver, rather than under or over-driving the system.
Both lamps share the same 840mm length and 4-pin even base, but wattage is where they part ways, and it's not something you can substitute one for the other without checking your system's original specification first. If your steriliser lists any of the brands above, cross-referencing the wattage on your current lamp or in your system's manual is the fastest way to land on the right replacement.
These lamps suit households and small commercial setups running Aquapro, GermicidaLight, HRV, Steriflo or Waterguard sterilisers, which are common across rural tank supplies and mains-fed properties alike in New Zealand. Pricing sits at $107.18 for the 40W option and $117.07 for the 80W, both landing in a similar range regardless of which system you're replacing a lamp for.
If you're unsure which of the two matches your unit, the safest check is comparing the wattage figure stamped on your existing lamp rather than guessing from your steriliser's outward brand name alone, since some brands share housings across multiple wattage variants.
FAQs
What’s the difference between the 40W and 80W lamp?
Wattage relates to the UV output a lamp produces, around which different steriliser models are designed. A system built for 40W won’t get the correct dose from an 80W lamp and vice versa, so the two aren’t interchangeable across models. Check which wattage your system originally shipped with before ordering.
How do I know if my UV steriliser uses a 4-pin even connection?
Look at the base of your current lamp. A 4-pin even connector has four pins spaced evenly around the base, rather than offset or in a different count. Your system’s manual will also list the connector type if the lamp isn’t easy to check visually.
How often should a UV lamp be replaced?
Most manufacturers recommend replacing a UV lamp every 9 to 12 months, even if it’s still lit. UV output drops well before the lamp visibly dims or fails, so a glowing lamp isn’t a reliable sign that disinfection is still effective.
Can I fit this lamp myself, or do I need a plumber?
Many UV steriliser lamps are designed for straightforward home swap-outs, provided you isolate the power and water supply first and follow your system’s manual. Hardwired or more complex installations are best left to a plumber or the system installer.
Will a compatible lamp affect my UV system’s performance or warranty?
These lamps are built to match the output and specifications of the original, so performance should be unaffected. Warranty terms sit with your steriliser’s manufacturer, so it’s worth checking your system’s documentation if you’re within a warranty period.
What happens if I keep using my system after the lamp has expired?
Visible light from the lamp isn’t a good indicator of disinfection strength. UV output declines steadily over the lamp’s life, so a steriliser can look fully operational while the water passing through it is barely treated.
How do I check my current lamp’s specs before ordering?
Length and wattage are usually stamped on the lamp body or listed in the steriliser’s manual. Cross-check both against the pin connector type before ordering, since a mismatch on any one of the three means the lamp won’t fit or perform correctly.
