So I kicked my first Corny keg and need to get the keg and the system cleaned and ready for another batch, which might not be ready for some time. What's my process here?


I like to rinse well, then soak in warm PBW (or cleaner of choice). I fill the keg with cleaner, put on the lid and shake really well. Then I remove the lid, poppets, O-rings and dip tubes and put them in the keg to soak overnight. Next day everything gets a good rinse in warm water. I fill the keg with some Starsan (or sanitizer of choice) and let the parts soak for a couple minutes. Reassemble, seal the lid and shake really well. Let it sit for a few minutes.

Then I hook it up to the gas and beverage lines and blow out the starsan leaving the keg sealed. Then I just leave it like that until I am ready for the next beer.

Any remaining foam in the keg will settle out as liquid. When ready to refill, open the top and I pour out that liquid with a bit of a swirl to help resanitize the opening at the lip a little bit. Then rack beer in.

The key to kegging happiness, IMO, is having empty kegs cleaned and sanitizes right away. Then you don't have to go looking for cleaner and sanitizer the day your next batch is ready.

  • 6
    I also leave the kegs under a touch of pressure; that way I know if any of the seals are bad when I come back, and I know nothing has gotten in. Otherwise, I agree: keep the kegs cleaned and ready to go.
    – sgwill
    Jun 3 '10 at 13:30
  • 5
    That's a pretty good process. I do something similar, only without the overnight soak. I start with a good rinse, then go for hot soapy water. I only PBW if it needs it or once a year. Then the same whole StarSan routine. I also use Cipfilm on all the rubber parts. I leave about a gallon of StarSan in the keg for storage. I have a speadsheet that I keep track of last PBW cleaning, date cleaned, last time poppets and other wearable parts have been changed and any potential difficulties I have been having with the keg. I number all of my kegs with those reflective number stickers.
    – TinCoyote
    Jun 3 '10 at 13:32
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    My overnight soak is more of a time commitment thing than a process related improvement. When I have time I prefer to do it all at once.
    – brewchez
    Jun 3 '10 at 17:33

First, shed a little tear for the empty keg. Then get excited about the next beer to fill it.

I'm not as methodical as brewchez. There are four dirty kegs sitting open in my garage right now. As you can imagine the leftover beer gets pretty dry and cakey. Never a problem.


PBW and it's ilk are my cleaner of choice. Put a few gallons of hot water & PBW in your keg, swirl and let soak until the gunk comes off. I do not fill all the way up to the top ring of crud so I usually have to do a little light scrubbing.

Disassemble and inspect the posts and tubes. Remove the lid and O-ring. I'll sometimes run a pipe cleaner through the dip tube. Soak everything in the cleaner for good measure.

For picnic taps, disassemble and clean the beer line. Regular taps can be cleaned every second or third (or fourth) keg. Fill a keg with cleaner and push it through with CO2.


With cold water.

If you cleaned your tap lines push some rinse water through them.


... with your favorite sanitizer. Soak the parts. Dump.

(Many sanitizers will retain their power if saved in a keg. I am thinking of making the switch to caustics for this reason.)


Whether you save sanitizer or dispose of it, reassemble the keg and charge with CO2 to seal.


Some people have a "clean tag" for kegs that have been through this process. I know a keg is clean if it is empty and charged.

  • Also a great answer. Sorry I couldn't accept both! Also, brewchez is breathing down your neck rep-wise! Jun 3 '10 at 17:55
  • He's been working hard & I'm slacking. Jun 3 '10 at 18:43

The other two answers and their comments are great. For my system, though, kegs are something of a limiting factor and I rarely have an extra empty laying around. If there's not a batch in primary waiting for the old keg to kick, I'll have racked a batch to secondary and have it waiting there.

  • Rinse, with cold water
  • Repeat. just rack a similar beer in there, charge with CO2, chill and force carbonate.

The ability to do this depends on the throughput of your brewery. (I have thirsty friends.) I would never attempt this if I had any of my containers sitting around for any length of time.

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