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Worcester Bosch Isolation Valve DCW Inlet 87161567520

Worcester Bosch

Worcester Bosch Isolation Valve DCW Inlet 87161567520

Worcester Bosch 87161567520 isolation valve for the domestic cold water inlet, fitted across 25 SI RSF and 28 SI RSF combi models.

At a glance

  • Part type: Isolation valve, domestic cold water inlet
  • Also known as 1019717
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87161567520
GC number
E27-568
Showing prices

£34.43

£28.69 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 87161567520 is an isolation valve for the domestic cold water (DCW) inlet of the appliance. It sits on the incoming cold water supply and allows the flow to be shut off at the boiler so that servicing, draining or component replacement can be carried out without isolating the whole property. It is used across the Worcester Bosch SI RSF combi range and the related British Gas-badged units.

Signs this part needs replacing

  • Water weeping from the valve body or around the spindle
  • Dripping at the joint where the valve meets the incoming pipework
  • The handle turns but the cold water supply does not shut off
  • A stiff or seized handle that will not move by hand
  • Damp staining, corrosion or limescale trails around the cold water inlet

Before you order

  • Check the GC number on the appliance data badge against the list below before ordering.
  • Confirm the part number 87161567520 or the alternative number 1019717 against the valve currently fitted.
  • 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.