Wide Compatibility: Fits various Vokera and Glowworm boiler models, compatible with part numbers 10025055, 2000801904, and 0020014173. Essential Safety Function: Prevents pressure buildup within the boiler, protecting the system from potential damage and ensuring safe operation. Durable Construction: Made from high-quality, resilient materials to withstand high-pressure conditions, offering reliable and long-lasting performance. Improved Boiler Efficiency: Maintains optimal pressure levels for smooth operation, enhancing the efficiency and longevity of the heating system. Simple Installation: Designed for easy installation by professionals or skilled DIY users, ensuring a secure and effective fit. 12-Month Warranty: Backed by a full 12-month warranty, providing peace of mind and confidence in product quality., Manufacturer: HTS