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Viessmann Pressure Gauge 7838087

Viessmann

Viessmann Pressure Gauge 7838087

Viessmann pressure gauge, part 7838087, for Vitodens 100-W boilers.

At a glance

  • Appliance family: Vitodens 100-W
  • Also known as 2321528
Manufacturer part no.
7838087
Showing prices

£83.40

£69.50 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 Viessmann pressure gauge 7838087 is a system pressure indicator used on Viessmann Vitodens 100-W gas boilers. It displays the sealed system pressure so the reading can be checked against the appliance's recommended filling pressure. The gauge is supplied as a spare component for service and repair work on the boiler.

Signs this part needs replacing

  • The needle no longer returns to zero with the system depressurised.
  • The gauge face is misted, cracked or the dial markings are unreadable.
  • The reading is inconsistent with the actual system pressure measured elsewhere on the circuit.
  • The needle sticks or moves in jumps rather than smoothly.
  • Leakage or moisture is visible around the gauge connection.

Before you order

  • Confirm the boiler model and serial number against the fit list above.
  • Check the part number on the existing gauge or in the appliance documentation matches 7838087.
  • Verify the fault is with the gauge itself rather than the system pressure or filling loop.
  • Depressurise and isolate the appliance before removing any component.

Not sure which part?

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