Recently chucked money at 2 pairs of Fillmore valves for our bikes then found that out. :(
https://www.emtbforums.com/threads/bye-bye-fillmore-valves.40216/
Did 20 miles through Venus Woods near Cocking with South Downs way in the left distance. Basically a test run for the new Maxxis High Roller 3 DH 29 front. With recent rain it's getting muddy - cleared mud really well and kept a downhill line incredibly well. Move over Magic Mary. ;)
Sorry, missed this ^^^
There's a thread on the top of the Fillmore poppet valve and a matching thread inside the cap. When the cap is screwed on it pulls up the poppet valve thus closing it.
Answer: Fillmore valve 1mm internal passage is self-evidently too small for a sealant with a larger particle size.
Being required to pour sealant directly into a bead-off tyre in order to get around a Fillmore valve design problem is taking the piss. Not for me, as said before it's back to...
Removed Fillmore valves from wife and my bikes and replaced them with Presta valves which is what was there before.
https://www.emtbforums.com/threads/bye-bye-fillmore-valves.40216/
I took a Fillmore valve to pieces to measure it for the below post - there is no spring in it.
https://www.emtbforums.com/threads/bye-bye-fillmore-valves.40216/post-569624
Replaced Fillmore valves with Presta valves, then measured Presta and Fillmore valves at pump end of valves.
Presta valve body ID with core removed = ~4.2mm
Fillmore valve body ID = ~3.5mm
Fillmore poppet valve stem OD = ~1.5mm
So the Fillmore valve has (3.5-1.5)/2 = 1mm each side of the...
This is what I use, Muc-Off sealant always goes in no probs. As you can see in the pic, the end of the tube goes over the Presta valve body (with the valve removed of course).
Because it works so well decided to keep the Muc-Off sealant and go back to Presta.
(IMO) Fillmore valves need a redesign, for example with the poppet valve removable from the top.