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Worcester Bosch Charging Key Assembly Small Filling 87161045910

Worcester Bosch

Worcester Bosch Charging Key Assembly Small Filling 87161045910

Worcester Bosch small filling charging key assembly, part 87161045910, for refilling heating system pressure on compatible Worcester boilers.

At a glance

  • Part type: Filling devices
  • Also known as 1014291, N0102
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87161045910
GC number
E89-757
Showing prices

£8.29

£6.91 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 small filling charging key assembly is the removable key and housing used to open the filling loop on compatible Worcester boilers, allowing the sealed heating system to be topped up with water. It sits within the filling device group of spares and forms part of the pressure-charging arrangement on the appliance. The assembly is supplied by Worcester Bosch under part number 87161045910.

Signs this part needs replacing

  • System pressure will not hold and the boiler repeatedly drops below the minimum operating pressure
  • The charging key spins or slips without opening the filling loop
  • Water weeps or drips from the filling key housing when the loop is opened
  • The key is stiff to turn, seized, or shows damage to the splines or body
  • Pressure cannot be raised at the boiler even with the key fully engaged

Before you order

  • Check the GC number and appliance serial plate against the compatibility list to confirm the correct filling device for your model
  • Compare the alternative part numbers 1014291 and N0102 with any markings on the existing key before ordering
  • Inspect the filling loop seals and washers at the same time, as these are commonly disturbed when the key assembly is removed
  • 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.