I'm now the proud owner of a corny keg. I just have a couple of questions about carbonating the beer and then what to do during / after serving.

As far as I'm aware, to carbonate the beer I just need to stick the Keg + Co2 tank at 10/12 PSI in a fridge at around 7C / 45f for a week.

Then I can turn the gas off to minimize leaking.

My first question is, what PSI to serve at?

I purchased this dispenser + hose + tap solution which has me worried. The length of the tube is about 22cm or 8.66". The width of the tube seems to be 5/16" or 8mm. Material appears to be PVC braided vinyl. The height from the keg seems negligible given the length of the dispenser.

I have had a look at some of the calculations for dispensing the beer but I'm don't think I'm doing it right.

It seems that I would have to bleed the all the gas from the keg before serving and then set the pressure to about 1 PSI to get anything except foam out of it. Would I then have to set the pressure back to 10 PSI to ensure the beer stays carbonated?

I'm just wondering if I should bite the bullet and purchase something like this to avoid any headaches when pouring day comes around.

Any advice is appreciated!

1 Answer 1


Yes, the 8" line length of the "Flexi-tap" kit is going to require a much lower serving pressure to pour without excessive foam. The ~5' line length of the "Beer line assembly" will let you keep the ~10psi head pressure to retain ~2.2 volumes CO₂, and serve at the same pressure.

  • Do you think if I attach a length (~3ft) of clear PVC hose to the dispenser with a universal connector (this model ) it might work?
    – TomSelleck
    Jul 28, 2015 at 16:24
  • Yes, but might as well add 4'4" to get the full 5'. ;) Also, with the design of that universal connector, depending on the beer-line ID, that might have some serious gaps, and be a bit of a PITA to clean.
    – jsled
    Jul 28, 2015 at 18:01
  • Ach yeah seems like too much hassle, might try pick up 5ft of the same braided vinyl on the flexi-tap and just swap it for the current one. Thanks again for the info!
    – TomSelleck
    Jul 29, 2015 at 8:36
  • One last thing! The current short hose looks like 5/16", should I replace it with a smaller one or keep the same width for the 5ft?
    – TomSelleck
    Jul 29, 2015 at 8:39
  • Look at the draft quality guide to see what the difference in line resistance is for 3/16" vs. 5/16", use that to determine what ID and what length you want. Page 36 has the resistance of various line types/sizes, and page 41 has a good example computation which is relevant to most homebrewers. As I said in the other issue, 3/16" is a good ID for most home scenarios. 3/16" line has 3lb/ft resistence; so if you want a head pressure of, say, 12 psi, 3.5ft of 3/16" line will resist almost all of the pressure, leading to about 1.5 psi at the tap, which is a good amount to still pour quickly.
    – jsled
    Jul 29, 2015 at 15:08

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.