What is a valve knob
A valve knob is a rotary knob located on the water or steam valve of a coffee machine. It serves as a handle that baristas or home users use to open and close the flow of hot water or steam needed for preparing beverages or frothing milk.
Signs of wear
Over time, the knob may become loose, overheat when in contact with steam, crack, or become harder to turn. A loose or damaged knob makes it difficult to precisely dose water or steam and can cause discomfort when handling it, or even steam leaking around the fitting.
Why timely replacement pays off
A functional knob ensures smooth and safe control of the valve. A damaged part increases the risk of burns or inaccurate control of the flow, which affects the quality of coffee preparation and milk frothing alike.
Selection advice
When choosing a replacement, follow the type of fitting and the thread size, which you can find in the compatibility table directly on the product page, to select a knob that matches your coffee machine.


