The Worcester Bosch 87161070440 Flow Regulator Type E-W is a genuine replacement hydraulic component designed to control and stabilise water flow within your central heating system. This 11 litre brown flow regulator ensures balanced circulation through radiators and the boiler’s heat exchanger by maintaining a consistent flow rate, helping support efficient heat transfer and reducing noise or stress on the pump. Consistent flow regulation improves heat distribution, reduces wear on internal components and helps maintain stable system performance.

This flow regulator is compatible with Worcester Bosch CDi and Greenstar series boilers that specify part number 87161070440 in their parts documentation. To ensure correct fitment and effective performance, always verify the part number on your existing regulator or consult your boiler’s service information before installation, as flow regulator types and capacities vary between models and system configurations.

Supplied ready for direct replacement, the 87161070440 Flow Regulator installs into the existing pipework and integrates with original mounting points without modification when fitted by a qualified engineer. Choosing this genuine Worcester Bosch component helps restore correct flow characteristics in compatible CDi and Greenstar boilers, supporting reliable heating performance and efficient water circulation.