Concentric Shower Knobs

thingiverse

I took a shower with weird concentric knobs - one to turn the water on and off, one for the temperature - which wore out and were no longer working. I couldn't find a replacement part, so I measured the valve stems and old knobs to make these new ones myself. Printed in PETG to stand up to use by two teenagers, since red was all I had available. No support is needed for the On/Off knob, but it does require some kind of support for the Hot/Cold knob.