Broad Compatibility: Fits Glowworm and Vaillant boilers, making it a versatile replacement option. Part Numbers: Compatible with 0020097214 and 0020213146, ensuring a perfect fit for your system. Efficient Water Flow Control: Regulates the flow of hot water, directing it between the heating circuit and domestic hot water supply, preventing system malfunctions and ensuring optimal performance. Durable Construction: Made from high-quality materials designed to withstand the demands of your heating system for long-lasting reliability. 12-Month Warranty: Comes with a 12-month warranty, offering peace of mind and confidence in your purchase., Manufacturer: HTS