Greetings,
It seems like people struggle with suitable, affordable needle valves for the takeoff on refIux columns. I found a stainless needle valve for under 12 bucks that the seller says is a PTFE seat:
https://www.ebay.com/itm/262154717987?V ... 2154717987" onclick="window.open(this.href);return false;" rel="nofollow
I've ordered one and hopefully this helps someone.
Needle Valve source
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