[TennesseeZ]

Speedy, not trying to pick hairs here, but going from 35 yrs as a pipefitter, I believe you're linking to a needle valve in your first post, not a gate valve. A needle valve, or preferredly a globe valve, of which you'll probably not find in 5/16, can be used to fairly accurately regulate flow. The gate valve is not really a "fine adjustment" device. Gate valves, and ball valves, are the most common types available.




































































' type device.

















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