UV Replacement Bulbs & Germicidal Lamps | Shop All Leading Brands

Welcome to our Vast Range of Replacement UltraViolet Bulbs for your Water FIlter, Air Purifier,

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What UV bulb do I need for my system

To ensure your system meets the safety requirements of the Water Supply (Water Fittings) Regulations 1999, follow this three-step process to identify your replacement lamp:

1. Identify the System Brand

The first step is to locate the manufacturer's name on the stainless steel UV chamber or the control power box (ballast). UV systems are precision-engineered; bulbs from different manufacturers are rarely interchangeable due to specific electrical requirements.

2. Locate the Model Number

Look for a silver or white sticker on the control unit or the side of the chamber. This model number determines the flow rate (measured in litres per minute) the bulb is designed to handle. Using a bulb designed for a smaller system will result in untreated water.

3. Verify Length and Base Type

Once you have the model, verify the physical attributes to avoid ordering errors:

  • Length: Measure the glass portion of the bulb (usually in mm or inches).
  • Base (Pins): Check the "end" of the bulb. Common configurations include 4-pin single-ended (all pins on one side), 2-pin double-ended, or specialized keyed bases unique to certain brands.

Not Sure What Bulb you need?

Why Precision Matters

Under regional water byelaws, any water fitting—including treatment units—must be of an appropriate quality and standard. Using the wrong bulb is considered a "faulty" fitting, which can lead to the contamination of water.

Safety Alert: If your water test shows E. coli or Coliforms, you must ensure your UV system is functioning perfectly. UV bulbs typically lose their germicidal effectiveness after 9,000 hours (approximately 12 months) of continuous use, even if they are still glowing blue.

Questions about replacement bulbs

Yes. A blue glow indicates that the lamp is receiving power, but it does not mean it is still producing germicidal UV-C radiation. Over time, the mercury inside the lamp dissipates and the quartz glass "solarizes," blocking the effective 254nm wavelength. For residential water safety, UV bulbs must be replaced every 9,000 hours (approximately 12 months) to ensure they are actually neutralizing bacteria and viruses.

A Genuine (OEM) bulb is made by the system manufacturer (e.g., Viqua, Luminor) specifically for their ballast's electrical output. A Compatible bulb is a third-party alternative designed to match those specifications at a lower cost. While high-quality compatible bulbs offer excellent disinfection, you must ensure the wattage, base type (e.g., 4-pin vs. 2-pin), and length are identical. Using the wrong bulb can cause the ballast to overheat or fail to strike the lamp.

UV lamps contain small amounts of mercury and are classified as hazardous waste under WEEE (Waste Electrical and Electronic Equipment) regulations. They must never be placed in your household recycling or general waste bins. You should take old lamps to your local Household Waste Recycling Centre (HWRC) and place them in the dedicated "Fluorescent Tube" or "Hazardous Waste" section.