Steam tap knob for older Gaggia Classics

Steam knobs crack with heat and constant turning, and a split knob can slip on the spindle so the valve will not open. This replacement pushes straight onto the tap. The knob simply pulls off and the new one presses on.

D-shaped bore, embossed face

The knob is a short black cylinder with an embossed steam symbol on the face. Inside, a ribbed hub with a D-shaped hole grips the valve spindle without a grub screw. A worn or split knob can make the steam valve feel loose even when the valve itself is fine. Replacing the knob first is a cheap test before you consider the valve.

Specifications

Gaggia Classic Steam Knob Bore: D-shaped, 6 × 4.6 mm
Gaggia Classic Steam Knob Diameter: approx. 34 mm
Gaggia Classic Steam Knob Height: approx. 36 mm
Gaggia Classic Steam Knob Material: Plastic
Gaggia Classic Steam Knob Colour: Black
Gaggia Classic Steam Knob Weight: approx. 20 g

Models it suits

Made for the Gaggia Classic before 2015, plus the Gaggia Coffee and DeLuxe. If the valve itself leaks, see the Gaggia Classic steam valve, and a Pannarello steam wand set completes the steam side.

For a full steam-system check, see our repair and servicing page – we can fit it for you.