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Worcester Bosch Seal Siphon Top 8716117064

Worcester Bosch

Worcester Bosch Seal Siphon Top 8716117064

Worcester Bosch seal siphon top, part 8716117064, for Greenstar i ErP system boilers, giving an airtight siphon joint to prevent leaks.

At a glance

  • Part type: Gaskets, o-rings, seals and washers
  • Also known as 1031135
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
8716117064
GC number
J25-246
Showing prices

£3.97

£3.31 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 seal siphon top, part number 8716117064, is a replacement seal for the top of the condensate siphon assembly on Worcester Bosch Greenstar i ErP system boilers. It forms the airtight joint at the siphon top, keeping condensate contained and preventing water or flue gases from escaping past the connection. The seal is a service item, so it is replaced when the original has hardened, distorted or started to weep.

Signs this part needs replacing

  • Condensate weeping or dripping from the top of the siphon assembly
  • Damp patches, staining or water marks inside the boiler casing around the condensate trap
  • A seal that has hardened, flattened, split or lost its shape when inspected
  • The siphon top failing to seat squarely, leaving a joint that does not seal
  • Recurring condensate trap faults traced back to a poor seal at the siphon top

Before you order

  • Check the GC number on the appliance data badge against the compatibility list before ordering.
  • Quote part number 8716117064 or alternative number 1031135 when checking stock.
  • 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.