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Worcester Bosch Diverter Adaptor Assembly 87186814600

Worcester Bosch

Worcester Bosch Diverter Adaptor Assembly 87186814600

Diverter adaptor assembly for Worcester Bosch Greenstar Highflow 440CDI and 550CDI boilers.

At a glance

  • Part type: diverter adaptor assembly
  • Also known as 1022652
Manufacturer part no.
87186814600
GC number
H71-390
Showing prices

£30.65

£25.54 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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 diverter adaptor assembly is a Worcester Bosch component for the Greenstar Highflow range. It is fitted as part of the appliance's diverter valve assembly, which controls the direction of water flow between domestic hot water and heating operation. This part is identified by Worcester Bosch part number 87186814600.

Signs this part needs replacing

  • Domestic hot water runs cold or fluctuates while the heating is off
  • Radiators heat up when only hot water is being drawn
  • Hot water temperature becomes inconsistent between draws
  • Water weeps or drips from the diverter adaptor area
  • The diverter assembly fails to change between heating and hot water modes

Before you order

  • Confirm the appliance model is a Greenstar Highflow 440CDI or 550CDI
  • Check whether the boiler is the NG or LPG variant
  • Verify the existing part is marked or listed as 87186814600
  • Inspect the surrounding diverter assembly for related damage before fitting

Not sure which part?

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