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Potterton Injector 8.5mm 655903

Potterton

Potterton Injector 8.5mm 655903

8.5 mm gas injector for Potterton Commercial Paramount boilers, matched to Dungs valve arrangements.

Manufacturer part no.
655903
Showing prices

£34.80

£29.00 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 injector is an 8.5 mm gas injector used in Potterton Commercial Paramount boiler installations. It meters gas into the burner through the Dungs valve arrangement, so the injector bore directly influences the gas rate and combustion quality at the stated 95 kW rating.

Signs this part needs replacing

  • Boiler fails to establish a stable flame or locks out on ignition
  • Combustion readings drift outside the expected range for the appliance
  • Visible soot or discolouration around the burner or injector area
  • Gas rate cannot be set to the appliance data plate figure
  • Sooting or debris build-up visible in the injector bore

Before you order

  • Confirm the injector bore marked on the existing part matches 8.5 mm
  • Check the boiler model and output against the fits list above
  • Verify the valve arrangement is a Dungs type before ordering
  • Confirm the appliance data plate rating matches the 95 kW or 80 kW variants listed

Not sure which part?

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