DOMESTIC UV SYSTEMS Replacement UV Bulbs & Sleeves Although UV systems are easy to maintain, it is important to clean the quartz sleeve and replace the UV bulb at the recommended intervals (usually once a year). Without proper maintenance UV systems can lose their effectiveness at destroying bacteria, potentially leading to unsafe drinking water. All of our replacement bulbs and sleeves are the same genuine items manufactured by Sita UV for use in our domestic UV range (UV D1/D2/D3/D4). How Often Do I Need To Replace The Bulb And Quartz Sleeve?UV bulbs need to be replaced annually or immediately if faulty. The quartz sleeve should be checked and cleaned at 3-6 month intervals and replaced if uncleanable or damaged. Check and clean quartz sleeves with care, as they are easily breakable. Why Choose Our Replacement UV Bulbs & Sleeves? Genuine replacements manufactured by Sita UV Quartz sleeves, seals and bulbs kept in stock Suitable for UV D1/D2/D3/D4 systems Low energy high dosage bulbs Compatible Products:Domestic UV Systems Water Treatment Products We’re pleased to offer a comprehensive range of water treatment products, from replacement media to complete systems. Can’t find exactly what you’re looking for? Get in touch with a member of our team today. Browse all Water Treatment products →