Originally Posted by
weirtech
my back purge setup consists of a t fitting between the bottle regulator and the flow regulator. there is a quick disconnect that i plug a hose into that has a ball valve for turning it on and off which is followed by a needle valve that i adjust flow with and that has a piece of copper tube coming out of it that i use to press into a plastic cap plug. it has worked fantastic for the last 10 years.
This it's the best way to do it cheaply. Once the chamber is filled, you don't need much flow at all if it's sealed to a small degree.
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