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Worcester Bosch Flow Regulator 8 Litre Type E-W 87161410540

Worcester Bosch

Worcester Bosch Flow Regulator 8 Litre Type E-W 87161410540

Worcester Bosch 8 litre Type E-W flow regulator (87161410540) for Greenstar and CDI appliances, controlling fluid direction and flow rate.

At a glance

  • Part type: Flow regulator
  • Also known as 1017697
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87161410540
GC number
379-215
Showing prices

£9.58

£7.98 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch 8 litre Type E-W flow regulator is a water flow control component used across a wide range of Worcester Bosch heating and hot water appliances. It governs the direction and rate at which fluid moves through the system, and in some circuits it also acts as a check valve, stopping fluid from drifting into areas where it should not go. It is a direct replacement part for the original fitted to Greenstar, CDI and older Worcester models.

Signs this part needs replacing

  • Domestic hot water flow rate drops or becomes inconsistent at the tap
  • Water temperature fluctuates or the appliance cycles when a tap is running
  • The regulator body shows scale build-up, debris or physical damage
  • Backflow or cross-flow between circuits that the check valve function should prevent
  • Leaks or weeping around the regulator housing or its connections

Before you order

  • Check the appliance GC number or serial plate against the compatibility list to confirm the correct fitment.
  • Confirm the previous number ZBUNC138 if you are matching against an older parts reference.
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.