Best quality threaded disconnects?

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Omega

Omega

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I have one light grey (as I understand, it is for gas) and several black disconnects that I use to transfer beer from fermenter to kegs and from kegs to serve. Couple of black disconnects are leaking, I do't know why. I guess I should simply replace them as they seem not to expensive, but would like to buy some good quality that won't leak. Is there a difference in quality between disconnects? I might have bought them from two different suppliers and all black disconnects seem to look the same, so I cannot differentiate by looking at them
I regularly connect and disconnect kegs and serving gun in case disconnect start leaking
And can I use grey disconnect to transfer beer? Will it last?
Thank you
 
I think a lot of the problems with leaking disconnects are from either o-rings on posts needing some maintenance/replacement or the disconnect itself needing lubrication. I notice one of mine (gas) is getting a bit sticky, so a squirt of silicon oil in there probably needed.

I find the duotight ones to be very good, if none of the above apply to you. Very positive and easy to install/remove. They're not threaded though. Just push on.
 
As I understand, I need food grade lubricating spray. I see the Malt Miller have them, guess will order from them along with disconnect
 
Guess I will buy stainless steel ones
Vaseline - do you put it inside the disconnect or only cover the post? Thinking it will be fiddly applying inside the disconnect thinly
 
Just a smear on the post.

On Co2 on cornies is OK, but don't assume it's OK with all gas fittings - you never grease oxygen fittings, as they explode.
 
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I like the CMB ones, they can easily be taken apart to clean and have given me good service.
My cornies and disconnects are grey = gas in, black = liquid out.
The carb caps I have are universal, which is handy.
 
Hi,
I have never seen a disconnect that can't be taken apart, it should really be part of a cleaning regime.
I wouldn't use Vaseline as it may actually shorted the life of the O rings, right lube for the right occasion;) Use something silicone based.
The kegland original disconnects are nice quality and will give very little issue, my preference is threaded as it gives movement in the line, much easier in any dispense set up.
I don't see the added cost of the stainless disconnects adding anything to the party.
https://www.themaltmiller.co.uk/product/keg-disconnect-set-inc-jg-fitting/
 
All the plastic ones can be stripped - just stick a stout flat head driver in the top and twist.

For the grey/black plastic ones CMB, Keg King and Kegland have all been identical for me in practice over several years.

I use stainless steel flow control disconnects for liquid, but if you don't need flow control I think steel disconnects just introduce issues over the plastic ones:
  • They expand and contract a bit more due to temperature changes, meaning putting a cold disconnect onto a warm keg post can be tricky, although a little silicone grease on the post o-rings really helps.
  • Where the flare connector screws in to the body of the disconnect there is an extra o-ring a plastic disconnect doesn't have. You need to make sure that o-ring is in good condition and everything is screwed in well otherwise your beer will leak out (I lost an entire keg of beer to this).
  • The flare fittings don't always seal well on their own, although metal disconnects will usually come with a little nylon washer you can put in to fix that.
 

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