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Vaillant 010138 Adjusting Screw - MAG 125/MAG 9

Vaillant

Vaillant 010138 Adjusting Screw - MAG 125/MAG 9

Vaillant 010138 adjusting screw for MAG 125 and MAG 9 gas water heaters.

At a glance

  • Also known as 1372035
Manufacturer part no.
010138
Showing prices

£9.60

£8.00 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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 Vaillant adjusting screw, part number 010138, used on MAG 125 and MAG 9 gas water heaters. It forms part of the appliance's adjustment assembly, allowing the relevant setting to be altered and held during servicing or commissioning. The screw is supplied as an individual component.

Signs this part needs replacing

  • The screw turns but no longer holds its setting, allowing the adjustment to drift.
  • The head is rounded or chewed, so a screwdriver cannot gain proper purchase.
  • Threads are corroded, flattened or cross-threaded, making adjustment stiff or impossible.
  • The screw is seized in its housing and cannot be turned without risk of damage to the surrounding assembly.

Before you order

  • Confirm the appliance model from the data badge, as several MAG 125 and MAG 9 variants use different adjustment arrangements.
  • Check the existing screw against the 010138 part number before ordering.
  • Inspect the mating thread or housing for damage, as a worn seat will not hold a new screw correctly.
  • Isolate the appliance and allow it to cool before starting any work on the adjustment assembly.

Not sure which part?

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