Jem is a tap-mounted activated-carbon water filter with a mechanical idea that is easy to understand when you see it move. The top opens like a flower, so activated carbon can be poured in as if through a funnel.
After filling, the petals move down and the filter opens into its working shape. The body then attaches to standard taps and stays there, ready for water to pass through the activated carbon before it leaves the filter.
The bottom grid is crucial. It holds the activated carbon inside the filter while still letting water flow through. That grid has to be clean, because it sits directly in the water path.
For that reason, Jem uses a controlled G-code workflow. The base, middle, upper-middle and upper sections are sliced as separate Cura G-codes and then joined so the print pattern can continue with fewer retractions.
Avoiding retractions helps avoid stringing and micro-stringing. Jem prints are checked under a microscope for exactly that reason: the goal is not only that the part looks clean, but that even small loose strings are avoided.
Material matters too. Jem is designed for polypropylene, a food-safe material with high chemical resistance and strong stability in water.
Jem
A polypropylene tap water filter for activated carbon. The flower-like top opens for filling, the body attaches to standard taps, and the bottom grid holds carbon while water passes through. Joined G-code keeps the water path cleaner by reducing micro-stringing.
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