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Vaillant Diaphragm Screw 010003

Vaillant

Vaillant Diaphragm Screw 010003

Vaillant 010003 diaphragm screw for the diverter valve assembly on Combicompact, Thermocompact, VCW and MAG appliances.

At a glance

  • Part type: diaphragm screw
  • Also known as 1372001
Manufacturer part no.
010003
GC number
262-017
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

The Vaillant 010003 is a diaphragm screw used in the diverter valve assembly of Vaillant gas appliances. It secures the diaphragm within the valve body, where it responds to pressure changes to switch the appliance between domestic hot water and central heating operation. It is listed under gas boiler spares in the diverter valve category.

Signs this part needs replacing

  • Corrosion or scale build-up on the screw shank or thread
  • Rounded or damaged screw head that will not take a driver cleanly
  • Water weeping from around the screw where it clamps the diaphragm
  • The diaphragm cannot be held securely, causing poor hot water or heating changeover
  • Thread damage preventing correct torque when refitting the diaphragm cover

Before you order

  • Confirm your appliance model and GC number against the manufacturer's parts list
  • Check the diverter valve assembly fitted to your appliance, as variants exist across the ranges listed
  • Check whether the screw is already included with the diaphragm kit you are fitting
  • Note the part number 010003 when comparing against the old component

Not sure which part?

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