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Worcester Bosch Siphon Horseshoe 4000 8716121405

Worcester Bosch

Worcester Bosch Siphon Horseshoe 4000 8716121405

Syphon horseshoe hose for Worcester Bosch Greenstar 4000 System boilers, part 8716121405.

At a glance

  • Also known as 2244684
Manufacturer part no.
8716121405
Showing prices

£32.12

£26.77 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 SIPHON HORSESHOE 4000 is a syphon hose manufactured by Worcester Bosch for the Greenstar 4000 System boiler range. It forms part of the condensate syphon assembly, carrying condensate away from the trap. The horseshoe shape allows the hose to sit within the boiler casing while maintaining the water seal in the condensate path.

Signs this part needs replacing

  • Water or condensate leaking from the syphon area inside the casing
  • Visible cracking, splitting or perishing of the hose, particularly at the bend
  • Condensate collecting in the boiler instead of draining away
  • Gurgling or irregular drainage from the condensate trap
  • Repeated boiler shutdowns linked to condensate not clearing

Before you order

  • Confirm the boiler model and GC number against the fit list before ordering
  • Check the syphon assembly for damage to the trap body as well as the hose
  • Verify that the existing hose is the horseshoe type used on the Greenstar 4000 System
  • Isolate the appliance and follow the manufacturer's procedure before removing condensate components

Not sure which part?

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