Maximum psi for ball lock liquid side QD

Brewing Processes
1

Anybody know what they’re normally rated to withstand?  I have a pal visiting from out of state tomorrow and to hurry along the carbing of a Pliny the Elder clone, I was hoping to get it mostly force carbed at 40 psi (34F) over 48 hrs.  I attached the liquid side to a faucet (in my kegerator) to check progress occasionally.

I went and checked it and there was a bit of beer foaming out the top of the QD.  Had to clean a few ounces of beer from the bottom of the kegerator but no big deal.  I replaced the QD with another one and disattached it from the keg for tonight.

I’m thinking I had a bad QD - the top was screwed down tight.  Still, I’m curious what pressure they normally can take.

I couldn’t find info after doing a google search.

2

40 psi shouldn’t be a problem. I’d break it down and make sure the top gasket is present and intact. I’ve lost more than a couple.

3

Same.  That’s the only time I’ve had one leak - no gasket.

4

Thanks guys.  Huh, the cheap ones I have don’t have a top gasket (under the screwdriver fed cap) - only one gasket, on the stem.  Anyway, the one I swapped on works fine at 40 psi, as you suggest.  And the beer is at least reasonably carbed now.  A few of us will be headed to see Bruce Hornsby and the Noisemakers tonight here in Spokane after fish tacos and of course homebrew at my house.

I’ll just toss the offending unit.  8)

5

The top gasket is easy to miss.  I didn’t even know there was one until I had a leaky disconnect.

I serve root beer at 40psi and the disconnects have never been a problem.