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Worcester Bosch Tank Assembly Painted 87186891780

Worcester Bosch

Worcester Bosch Tank Assembly Painted 87186891780

Painted tank assembly, part number 87186891780, for Worcester Greenstar Heatslave II ErP boilers.

At a glance

  • Also known as 2246863
Manufacturer part no.
87186891780
Showing prices

£1,130.63

£942.19 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 Worcester Bosch Tank Assembly Painted is a painted tank assembly supplied under part number 87186891780. It forms part of the expansion vessel arrangement on Worcester Greenstar Heatslave II ErP appliances, where it provides the contained volume that accommodates system water expansion as the boiler heats.

Signs this part needs replacing

  • System pressure rises sharply as the boiler heats up
  • The pressure relief valve discharges or drips during heating cycles
  • The pressure gauge reads higher than its normal cold fill point
  • System pressure needs topping up repeatedly once the boiler has cooled

Before you order

  • Confirm the appliance model matches one of the Greenstar Heatslave II listings above
  • Check the part number on the existing tank against 87186891780
  • Check access and clearance around the tank before starting the work

Not sure which part?

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