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Alpha Pressure Relief Valve 3 Bar 1.011126

Alpha

Alpha Pressure Relief Valve 3 Bar 1.011126

At a glance

  • Part type: Pressure relief valve
  • Also known as 1250023
Manufacturer part no.
1.011126
GC number
E57-703
Showing prices

£32.14

£26.78 ex. VAT · VAT at 20%

In stock
Order within 14h 49m for same-day dispatch
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Alpha 3 bar pressure relief valve is a safety component fitted to the sealed heating circuit of Alpha gas appliances. It opens progressively as system pressure rises, releasing water before the pressure reaches a level that could damage the boiler or the pipework. This valve is used across a wide range of Alpha combi and system models.

Signs this part needs replacing

  • Water weeping or dripping from the discharge pipe when the system is cold
  • Pressure gauge reading climbing steadily with no obvious cause
  • The valve failing to reseat after a pressure release, leaving a constant trickle
  • Boiler locking out or cutting out on a pressure-related fault
  • Scale or corrosion visible around the valve body or outlet

Before you order

  • Check the GC number on the appliance data badge against the compatibility list to confirm the correct valve
  • Compare the part number on the existing valve with 1.011126 before ordering
  • Confirm whether the sealing washer or connection seal needs renewing at the same time
  • Work on the sealed system should be carried out by a competent heating engineer

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.