The Worcester Bosch 87174010290 Domestic Hot Water Pressure Relief Valve is a genuine safety component designed to protect your boiler’s hot water circuit from excessive pressure. This relief valve automatically opens if domestic hot water pressure rises above a safe threshold, releasing small amounts of water to prevent damage to internal pipework, fittings and seals. By safeguarding against over-pressure, the valve helps reduce the risk of leaks, component stress and system faults, supporting reliable and safe operation.

This pressure relief valve is compatible with Worcester Bosch Greenstar series boilers that specify part number 87174010290 in their technical documentation. To ensure correct fitment and dependable performance, always verify the part number on your existing valve or consult your boiler’s service information before installation, as pressure relief devices and ratings vary between models and configurations.

Supplied ready for direct replacement, the 87174010290 Domestic Hot Water Pressure Relief Valve connects to the boiler’s hot water outlet circuit when installed by a qualified engineer. Choosing this genuine Worcester Bosch component helps maintain proper pressure control, supports safe hot water delivery and contributes to consistent, trouble-free heating system performance.