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Grundfos Pump UPM GEO 25-85 1.034021

Alpha

Grundfos Pump UPM GEO 25-85 1.034021

Grundfos UPM GEO 25-85 circulator pump supplied as part 1.034021 for Alpha Commercial PRO TEC PLUS LPG appliances.

At a glance

  • Also known as PUMP-GFOS-UPM-GEO-25-85, 1259846
Manufacturer part no.
1.034021
Showing prices

£363.56

£302.97 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 Grundfos UPM GEO 25-85 is a circulator pump used to move water around the heating circuit of an appliance. It is supplied under part number 1.034021 for Alpha Commercial PRO TEC PLUS LPG units. The pump maintains system flow through the boiler and associated heating pipework.

Signs this part needs replacing

  • No circulation, with the boiler firing but heat not reaching the radiators or cylinder
  • The pump is silent when it should be running, or runs only intermittently
  • Grinding, whining or rattling noise from the pump body
  • Repeated overheat or flow-related lockouts on the appliance
  • Visible leakage or weeping from the pump housing or connections

Before you order

  • Confirm the appliance model against the fitment list above before ordering
  • Check the markings and part number on the existing pump to confirm it matches the UPM GEO 25-85
  • Inspect the pump connections, seals and surrounding pipework for condition before fitting
  • Verify the electrical supply and control wiring arrangement on the existing installation before removal

Not sure which part?

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