Gas side pin lock leak

[mtrogers14]

I feel like the issue is the connection between the QD and the post for some reason

 

[camonick]

I feel like the issue is the connection between the QD and the post for some reason

I know you mentioned this several times earlier, but are you 100% that is where the leak is? If your cylinder is icing up, it is a very large leak and should easily be seen.
Do you have a way to submerge the entire keg while it’s still hooked up to the gas? Fill a trash can or barrel with enough water to cover everything and look for bubbles. If it truly is the gas side connection, you can then decide if it’s the connection or the keg by unhooking the QD and see if bubbling stops.
Is this system new to you and do you have any other kegs with similar problems?
A leak large enough and fast enough to ice the cylinder doesn’t seem like it would be after the regulator to me. I don’t know what kind of regulator you have, but do you have a nylon washer
between the valve and regulator stem. (Some regulators have a built in o-ring and the washer is unnecessar

 

[mtrogers14]

i can say this for sure, i could hear the leak in the area of the post, when I disconnect the QD the sound stops

 

[camonick]

Man... I don’t know what else to say/ try. If you’ve replaced everything and tried multiple combinations, I’m stuck.
Last idea. Are you using any lubricant on the post o-ring before you attach the QD?

 

[mtrogers14]

I have not, guess I could give that a try

 

[bracconiere]

is the screw on thing tight on the QD? it unscrews and screws on.......you can convert it to ball lock i believe.....(and damn, when i was going through a 20lb'r every month i wish i could remember where i found the leak, i just thought it was normal for a while.....)


when a keg is carbing it will hiss a bit when first turned on......if it sits and the pressure equalizes with out more pressure.....

I have a gauge that shows how much gas is left.

The only reliable way to tell how much CO2 you have left is to go by weight.

there's usually a TW stamp on the tank telling pounds empty....if the 'guage' is going down it's empty, and when it's empty it goes down FAST......swap it...weigh it, i keep mine on a scale, i use about an ounce a day carbing 2-4 kegs and serving a gallon....

 

[Maxkling]

Have you sprayed a soapy water solution to find the exact spot that’s leaking? Can you pressurize the keg and remove the disconnect and see if the keg holds pressure?

 

[BBBF]

I picked up a couple 3 gallon pinlocks and they definitely take a different oring. I was getting turbulence or sucking in air on the liquid side and bought some pinlock specific ones from Adventures in Homebrewing. I can't say yet if they fixed my problem, as I haven't had to use one of the pinlock kegs yet.
https://www.homebrewing.org/Post-O-Ring-for-Pin-Lock-Keg-_p_2501.html