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Potterton Injector 4.90mm Natural Gas 666701

Potterton

Potterton Injector 4.90mm Natural Gas 666701

Potterton 4.90mm natural gas injector for Paramount three, four and five 30 kW commercial boilers.

Manufacturer part no.
666701
Showing prices

£21.60

£18.00 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

This is a natural gas injector with a 4.90mm orifice, supplied by Potterton for its commercial boiler range. It meters the gas flow into the pilot or burner assembly on 30 kW appliances. The injector is identified by Potterton part number 666701.

Signs this part needs replacing

  • Pilot flame that is weak, yellow or unstable despite a clean assembly
  • Pilot that lights intermittently or fails to hold once the burner is running
  • Visible blockage, corrosion or deformation at the injector orifice
  • Soot deposits around the pilot assembly pointing to incorrect gas flow
  • Repeated lockouts on ignition that clear only after cleaning the injector

Before you order

  • Confirm the appliance is a 30 kW natural gas model, as this injector is sized for that rating.
  • Check the existing injector or documentation to confirm a 4.90mm orifice is required and that no conversion to another gas has been carried out.
  • Verify the part number 666701 against the boiler's spare parts listing before ordering.
  • Examine the pilot assembly for other worn components, such as electrodes or leads, that may need replacing at the same time.

Not sure which part?

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