There is another slightly cheaper alternative to the Fillmore valves, looks interesting and you can take it apart.
https://76projects.com/products/hi-flow-no-clog-tubeless-valves?variant=43816113897688
I did consider these but you need to carry an adaptor if you have thread on chucks (which I have a lot of) which turned me off them.
@ghettro started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
There is another slightly cheaper alternative to the Fillmore valves, looks interesting and you can take it apart.
https://76projects.com/products/hi-flow-no-clog-tubeless-valves?variant=43816113897688