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Worcester Bosch Grommet Expansion Vessel 87186802260

Worcester Bosch

Worcester Bosch Grommet Expansion Vessel 87186802260

Worcester Bosch expansion vessel grommet, part 87186802260, for Greenstar and Greenstar i ErP System Compact boilers.

At a glance

  • Part type: Grommet
  • Appliance family: Worcester Bosch Greenstar
  • Also known as 1031229
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87186802260
GC number
J08-304
Showing prices

£5.84

£4.87 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 87186802260 is an expansion vessel grommet manufactured by Worcester Bosch. It sits at the expansion vessel connection point inside the appliance, sealing the joint and cushioning the vessel neck against the surrounding casing or bracket so the connection stays watertight and free from chafe.

It is a service item within the Worcester Bosch Greenstar family, including the Greenstar i ErP System Compact models and the 30LXI. The grommet is supplied as a single component and is listed under Worcester's grommet spare part type.

Signs this part needs replacing

  • Water weeping or staining around the expansion vessel connection
  • A visible split, flattening or hardening of the rubber grommet
  • The grommet has perished and no longer grips or seals the vessel neck
  • Damp or corrosion marks on the casing or bracket around the vessel entry point
  • Repeated pressure loss traced to the expansion vessel connection area

Before you order

  • Check the GC number on the appliance data badge against the compatibility list before ordering, as the same model name can appear with different GC numbers.
  • Confirm the part number 87186802260 or the alternative number 1031229 against the original component.
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

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