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Vaillant Throttle Jet 2 x 4.00 049752

Vaillant

Vaillant Throttle Jet 2 x 4.00 049752

Vaillant throttle jet (pre-nozzle restrictor), 2 x 4.00 mm, for LPG Thermocompact and Turbomax boilers.

At a glance

  • Also known as 1372533
Manufacturer part no.
049752
Showing prices

£9.60

£8.00 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 Vaillant 049752 is a throttle jet, listed by the manufacturer as a pre-nozzle restrictor with a 2 x 4.00 mm bore, intended for LPG-fuelled appliances. It meters gas flow into the burner circuit on Vaillant Thermocompact and Turbomax boiler families. The part supersedes the earlier code 049639.

Signs this part needs replacing

  • Burner flame is unstable, lifting or visibly incorrect for an LPG appliance
  • Sooting or discolouration around the burner or heat exchanger
  • Combustion readings outside the expected range for the appliance
  • Repeated ignition lockouts or flame supervision faults
  • Restrictor is blocked, damaged or has been removed and not refitted

Before you order

  • Confirm the appliance is LPG-fuelled, as this restrictor is specified for LPG only
  • Check the model and GC number against the fitment list above
  • Compare the bore marking on the existing restrictor with the 2 x 4.00 mm specification
  • Check whether the older code 049639 is currently fitted, as this part supersedes it

Not sure which part?

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