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Worcester Bosch Flue Gas Duct Connector 87107253740

Worcester Bosch

Worcester Bosch Flue Gas Duct Connector 87107253740

Worcester Bosch flue gas duct to flue connector, part 87107253740, for Greenstar combi and condensing models. Alternative number 1012479.

At a glance

  • Part type: Adaptors & Connectors
  • Also known as 1012479
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87107253740
GC number
E74-522
Showing prices

£68.62

£57.18 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 87107253740 is a flue gas duct to flue connector, listed by the manufacturer under the adaptors and connectors group. It joins the flue gas duct run to the flue terminal assembly on Worcester Bosch Greenstar appliances, keeping the combustion gas path sealed and correctly aligned. The part sits within the flue system, so its condition directly affects how safely the appliance discharges products of combustion.

Signs this part needs replacing

  • Visible corrosion, staining or distortion on the connector body or its sealing faces
  • Soot deposits or discolouration around the flue joint, indicating combustion gases escaping
  • A persistent combustion or flue gas smell near the appliance or along the flue route
  • Flue-related fault codes or repeated lockouts on the boiler display
  • Condensate weeping or dampness at the flue duct joint

Before you order

  • Check the appliance GC number and serial plate against the compatibility list before ordering, as the same connector is used across several Greenstar variants.
  • Confirm the alternative number 1012479 matches the part currently fitted.
  • Inspect the flue seals and gaskets at the joint and replace them if they are compressed, cracked or contaminated.
  • 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.