Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Ariston Brass Cap 1/2 Inch 570571

Ariston

Ariston Brass Cap 1/2 Inch 570571

Ariston 1/2 inch brass cap, part number 570571, for use on Genus 27 BFFI boiler models.

At a glance

  • Also known as 1572704
Manufacturer part no.
570571
Showing prices

£13.39

£11.16 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 Ariston 570571 is a 1/2 inch brass cap used as a blanking or sealing fitting on Ariston Genus 27 BFFI boilers. It closes off a 1/2 inch threaded port on the appliance, keeping the hydraulic circuit sealed at that point. The cap is manufactured in brass for resistance to corrosion and to withstand the temperatures and pressures found in a domestic heating system.

Signs this part needs replacing

  • Visible weeping or a damp trace around the cap when the system is under pressure
  • Green or white corrosion product on the brass, or heavy limescale build-up on the threads
  • Rounded or chewed flats on the cap, making it difficult to tighten or remove
  • Staining or water marks on the casing or pipework directly below the cap
  • Cross-threaded or damaged threads that will not seal correctly

Before you order

  • Confirm the port you are blanking is 1/2 inch and that the existing cap matches this thread size
  • Check the boiler data badge against the model and edition list above before ordering
  • Inspect the mating thread on the appliance for damage, as a worn port will not seal with a new cap
  • Confirm whether a sealing washer or jointing compound is required for the joint on your appliance

Not sure which part?

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