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Potterton Injector 4mm 5122463

Potterton

Potterton Injector 4mm 5122463

Potterton 4mm gas injector, part number 5122463, for Promax 12 HE PLUS A and Promax System Erp 12 boilers.

At a glance

  • Also known as 1119861
  • Gas-carrying components must be fitted by a Gas Safe registered engineer
Manufacturer part no.
5122463
Showing prices

£11.76

£9.80 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 Potterton 4mm injector, part number 5122463, is a gas injector fitted to Potterton Promax System boilers. It meters gas into the burner at the rate the appliance is calibrated for. It is listed for the Promax 12 HE PLUS A System and the Promax System Erp 12.

Signs this part needs replacing

  • Burner fails to light, or lights intermittently
  • Weak, uneven or unstable flame at the burner
  • Sooting or discolouration around the burner area
  • Combustion readings outside the expected range on a flue gas analyser
  • Injector blocked or contaminated and no longer cleanable

Before you order

  • Confirm your boiler model against the fit list above
  • On Promax System Erp 12, check the serial number suffix (AC, BC, CC or DC)
  • Check the existing injector is 4mm and matches part number 5122463
  • Gas-carrying components must be fitted 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.