Kegco Regulator Ball Valve

does this go on the keg coupler gas post?

Hello Beachfly,

This part connects to the bottom of your regulator not to the keg coupler gas post. The air line connects directly on the nipple of the keg coupler gas post just make sure you put a clamp on the end of it to prevent any leakage. I hope this helps and thank you for your question.

Thank you,

How can I use a gas ball lock bulkhead with this, is there a plastic washer that should be on the inside of this to help seal between them? Example: https://www.kegland.com.au/ball-lock-post-with-1-4-inch-bulkhead-assembly-gas.html

As long as it has a 1/4" NPT thread, it should thread right in and not require anything else.