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Warmflow Mixer Valve 1621

Warmflow

Warmflow Mixer Valve 1621

Mixer valve, part number 1621, for Warmflow oil combi boilers.

At a glance

  • Appliance family: Warmflow oil combi boilers
  • Also known as 2410042
Manufacturer part no.
1621
Showing prices

£184.70

£153.92 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 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 Warmflow 1621 is a mixer valve used on Warmflow oil combi boilers. It blends the hot and cold water supplies within the appliance to deliver a controlled domestic hot water temperature at the outlet. It is a serviceable component within the boiler's hot water circuit.

Signs this part needs replacing

  • Domestic hot water temperature fluctuates or cannot be held steady at the tap
  • The valve spindle is stiff, seized or will not adjust
  • Water weeping from the valve body or spindle gland
  • Scale or debris build-up inside the valve causing restricted flow
  • Hot water runs consistently too hot or too cold regardless of setting

Before you order

  • Confirm your appliance is a Warmflow oil combi model
  • Check the part number on the existing valve against 1621
  • Inspect the valve connections and surrounding pipework for damage before removal
  • Verify the fault lies with the mixer valve rather than the boiler's temperature controls

Not sure which part?

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