A friend of mine has a water filter, the bleeder screw broke, no replacement available. This model has a wheel on top, so it's easier to handle then the original one which required a screwdriver (and that's why it broke).
Print with at least 4 walls to make it more durable and add more top layers to make sure it's watertight. Use PETG, ASA or ABS. Do not use PLA!
The author hasn't provided the model origin yet.