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Ariston Main Flow Switch 570490

Ariston

Ariston Main Flow Switch 570490

Main circuit flow switch for the Ariston STYX SX 20 M gas boiler, from serial number 92010000.

At a glance

  • Part type: main circuit flow switch
  • Also known as 1572660
Manufacturer part no.
570490
Showing prices

£95.58

£79.65 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 Ariston 570490 is a main circuit flow switch for Ariston gas boilers. It monitors water flow through the boiler's main circuit and signals the control board when circulation is established. This part is listed for the Ariston STYX SX 20 M.

Signs this part needs replacing

  • Boiler fails to fire when there is a demand for heating or hot water
  • Intermittent lockouts or ignition faults that clear on reset
  • Pump runs but the boiler does not respond to water flow
  • No flow signal detected at the control board

Before you order

  • Confirm the boiler model is the Ariston STYX SX 20 M
  • Check the boiler serial number is 92010000 or later
  • Compare the part number on the existing switch with 570490
  • If the serial number cannot be read, check the manufacturer's parts list for your appliance

Not sure which part?

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