Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Worcester Bosch Safety Relief Valve 87186438140

Worcester Bosch

Worcester Bosch Safety Relief Valve 87186438140

Safety relief valve for Worcester Bosch Greenstar 24 FSN-GB and 28 FSN-GB combi boilers, part number 87186438140.

At a glance

  • Part type: safety relief valve (pressure relief valve)
  • Appliance family: Greenstar combi boilers
  • Also known as 1031491
  • Work on gas appliances must be carried out by a Gas Safe registered engineer
Manufacturer part no.
87186438140
GC number
J09-211
Showing prices

£34.74

£28.95 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 Worcester Bosch 87186438140 is a safety relief valve used in the manufacturer's Greenstar combi boiler range. It opens to release excess pressure from the heating circuit, protecting the appliance and system components from over-pressurisation. It is listed under pressure relief and safety valves in the gas boiler spares category.

Signs this part needs replacing

  • Water discharging continuously from the pressure relief discharge pipe
  • Boiler losing pressure repeatedly and needing frequent top-ups
  • System pressure rising above the normal range during heating
  • Dripping or weeping from the valve body or outlet
  • Pressure gauge reading high with no other obvious cause

Before you order

  • Confirm your boiler model matches one of the fitments listed above
  • Check the part number against the valve fitted or the manufacturer's parts list
  • Work on gas appliances 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.