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Worcester Bosch O-Ring 9,5X2,5 (10X) 8737713709

Worcester Bosch

Worcester Bosch O-Ring 9,5X2,5 (10X) 8737713709

Worcester Bosch O-ring 9,5x2,5 mm, supplied in a pack of 10, for use on compatible Greenstar gas boilers.

At a glance

  • Also known as 1038449
Manufacturer part no.
8737713709
Showing prices

£5.42

£4.52 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 O-RING 9,5X2,5 (10X) is a Worcester Bosch sealing O-ring with an internal diameter of 9,5 mm and a cross-section of 2,5 mm. It is supplied in a pack of 10 and is used to seal joints and connections on compatible Worcester Greenstar gas boilers, preventing water or gas weeping at the fitted point. The O-ring is a service part intended for renewal when the existing seal has hardened, flattened or perished.

Signs this part needs replacing

  • Visible water weeping or a damp trace around a sealed joint or connection
  • The O-ring has hardened, flattened or lost its elasticity
  • Cracking, splitting or deformation visible on the ring
  • Discolouration or scale build-up on the seal surface
  • A joint that continues to weep after the housing has been tightened correctly

Before you order

  • Confirm the appliance model is listed in the Fits section above
  • Check the existing O-ring dimensions (9,5 mm internal diameter, 2,5 mm cross-section) against the failed part
  • Note that this item is supplied as a pack of 10, so only one pack is normally needed per repair
  • Check the manufacturer part number 8737713709 against the part reference on the appliance or in its documentation

Not sure which part?

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