Perfect Compatibility: Specifically designed for use with Worcester boilers, this 6L Expansion Vessel replaces part number 87161055450, providing a direct and reliable fit. Pressure Regulation: The expansion vessel helps to absorb pressure changes within the system, preventing unnecessary wear on the boiler and other components, ensuring consistent and efficient performance. Durable Construction: Built to withstand the demands of regular use, this expansion vessel is crafted from high-quality materials, offering long-lasting reliability. Enhanced Boiler Performance: The expansion vessel ensures that your Worcester boiler operates at its peak efficiency, reducing the risk of system failures and maintaining consistent hot water and heating. 12-Month Warranty: Backed by a 12-month warranty, this expansion vessel guarantees peace of mind, ensuring it meets the highest standards of quality and reliability., Manufacturer: HTS