The Milkit tubeless tire valves are simpler because of the one-way valve system when the valve core is removed from the valve.
This allows for easy tubeless inflation as airflow is significantly increased into the tire without the valve core inside the valve but then will also hold the air in the tire once it isn’t being inflated anymore.
(I have a hard time visualizing that, so watch the video).
The uses a standard syringe paired with a long tip to be able to check and refill your tire sealant without having to remove your tire.
Milkit turns a 15-minute messy process into a 3-minute simple and effortless system. I think it also means that sealant won’t foul the valve core either.
The process is