The Worcester 87161064370 By-Pass Pipe Assembly is a genuine replacement hydraulic component designed to regulate water flow within your boiler’s central heating circuit. The bypass assembly creates a controlled route for a portion of water to return from the flow to the return side when there’s low demand on the heating system. This helps prevent excessive pressure on the pump, reduces noise, and promotes stable heat exchanger temperatures, all of which support efficient performance and reduce wear on internal components.

This by-pass pipe assembly is compatible with Worcester and Worcester Bosch boilers that specify part number 87161064370 in their parts documentation. To ensure correct fitment and dependable operation, always verify the part number on your existing bypass pipe or consult your boiler’s service information before installation, as pipework configurations can vary between models and system layouts.

Supplied ready for direct replacement, the 87161064370 By-Pass Pipe Assembly connects with the boiler’s existing pipework and mounting points without modification when installed by a qualified engineer. Choosing this genuine Worcester Bosch component helps restore correct hydraulic balance, supports efficient heat delivery and maintains system integrity in compatible boilers.