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Riello Block Electrode R40 Mectron 2 3 3005721

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Riello Block Electrode R40 Mectron 2 3 3005721

Block electrode for Riello R40 and Mectron 2/3 oil burners, supplied under part number 3005721.

Manufacturer part no.
HRP9140
Showing prices

£28.70

£23.92 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 Riello block electrode (3005721) is an ignition component used in Riello oil burner assemblies, referenced in the product name against the R40 and Mectron 2/3 burner ranges. It forms part of the burner's ignition circuit, where the electrode establishes the spark that lights the oil and air mixture at start-up. It is listed here as an oil burner spare for boiler applications.

Before you order

  • Confirm the burner model on the appliance matches the R40 or Mectron 2/3 references given here.
  • Check the part number stamped or printed on the existing electrode against 3005721.
  • Examine the electrode block and its mounting arrangement on the burner before ordering, as electrode assemblies vary between burner builds.
  • If the burner has been serviced recently, confirm which ignition components were replaced to avoid duplicate ordering.

Not sure which part?

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