Replacement knobs for the water softener: for the closing cap and for the delivery/regeneration tap.

Softener cap knob: for closing the machine body. Red tap knob: for controlling flow during the regeneration cycle.

For other spare parts see Water Softener Spare Parts and Tap.

Frequently asked questions

How do I choose the right knob?
Check whether you need it for the closing cap or for the delivery tap: these are two different components.

Why doesn't the tap turn properly anymore?
Often it's the knob that has worn down or cracked at the coupling point: replacing it restores smooth operation.