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Thermowatt 3401609 1 3/4" 14" 3kW Incoloy Immersion Heater

Advanced Water

Thermowatt 3401609 1 3/4" 14" 3kW Incoloy Immersion Heater

Thermowatt 3401609 immersion heater with a 1 3/4" thread, 14" length, 3kW rating and Incoloy sheath for cylinder use.

At a glance

  • Also known as 2081317
Manufacturer part no.
580-255-0002
Showing prices

£123.84

£103.20 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 Thermowatt 3401609 is a screw-in immersion heater for domestic hot water cylinders, rated at 3kW with a 14" element length and a 1 3/4" threaded boss connection. The sheath is manufactured in Incoloy, which is specified for cylinders where water quality or operating conditions call for a corrosion-resistant element material. It is a cylinder heating element rather than an appliance-specific spare.

Before you order

  • Confirm the cylinder boss thread is 1 3/4" — immersion heaters are also produced with other thread sizes that will not interchange.
  • Check the cylinder's immersion opening accepts a 14" element length, as the element must sit within the cylinder without fouling.
  • Verify the 3kW rating is suitable for the cylinder and the circuit supplying it, and that any existing thermostat or control arrangement is compatible with the installation.

Not sure which part?

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