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Keston 3/8 Inch Automatic Air Vent B04220003

Keston

Keston 3/8 Inch Automatic Air Vent B04220003

Keston 3/8 inch automatic air vent, part B04220003, for removing trapped air from Keston condensing boilers.

At a glance

  • Also known as 1630410
Manufacturer part no.
B04220003
Showing prices

£22.25

£18.54 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 Keston 3/8 INCH AUTOMATIC AIR VENT is a boiler air vent manufactured by Keston under part number B04220003. It fits a range of Keston condensing boilers and combination, system and gas-only models, where it automatically releases trapped air from the heating circuit. The vent has a 3/8 inch connection.

Signs this part needs replacing

  • Continual air noise or gurgling from the boiler after the system has been filled and vented
  • Water weeping or dripping from the vent body
  • The vent fails to close and continues to pass water once the system is up to pressure
  • Repeated air locking in the boiler or radiators that does not clear after bleeding
  • Corrosion or scale build-up around the vent head preventing it from sealing

Before you order

  • Confirm the part number on the existing vent is B04220003
  • Check the connection on the appliance is 3/8 inch before ordering
  • Match the boiler model against the fit list above
  • Isolate the appliance and allow it to cool before removing the old vent

Not sure which part?

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