Ha, I was thinking the same when I taped it up. Initially I was going to transfer to another cube but then remembered duct tape and plane repairs and thought what the hell.Yob said:Is that food grade duct tape?
Yes that seems about right, it will go by the temperature the beer is served at, for me I would be needing to pressurise the head space at say 20 C to around 10 to 12 PSI cool to 10 to 12 C for an English ale to get the serving carbonation right.5 psi would be ok for fermenting but it would be better to go a bit higher for carbing and conditioning to speed things up.
A couple of my UK plastic pressure barrels had a small hole near the bottom of the gas post covered with a rubber ring that vented co2 at around 10 psi
How did you go with that Sean, I have noticed that with a 4 mm dia tube between the fermenting cube and the gas catching cube the krausen seems suppressed I was thinking of using tap caps between the two cubes,As WEAL has taken carbing in a cube to a new level over here in the https://aussiehomebrewer.com/threads/fermenting-under-pressure.66163/page-19 thread it has got me thinking about fermenting under pressure then carbing and conditioning in a cube before a keg (or cask).
Unlike racking to a cube and priming it, if using one as a pressure fermenter its going to need a Pressure relief valve so I’ve come up with this simple idea.View attachment 110367
I have drilled a small 1mm hole in a piece of beer line (marked with red pen) and covered it over first with a wide elastic band tied around it.
Pumped up with a bike pump this releases excess pressure and holds at around 6 psi.
The green ring in the pic is a band from a Noosa rat trap, I then slid the elastic band off the hole and covered it with the green ring and pressure is released at around 15psi.
My thinking is that with playing around with different size rubber bands pressure could be regulated at whatever is desired. Start fermenting at a low pressure with light band then increase near the end with a heavier band.
I agree with NickB, do the math 12psi over 200 sq" + gas is an energised fluid, the force is enormous! A split rim at 2psi will take your head off, this imho is a very unsafe practice. Just because it hasn't doesn't mean it wont....Holy shit. Someone is going to cop a hell of a blast in their face
It just doesn’t happen mate. Time has shown that cubes are perfectly safe to use for fermenters, casks and no chill. No explosions and the sky has never fallen down. I have only ever had one cube fail in use as a cask and it just stretched until a pin hole appeared and squirted beer out the side.I agree with NickB, do the math 12psi over 200 sq" + gas is an energised fluid, the force is enormous! A split rim at 2psi will take your head off, this imho is a very unsafe practice. Just because it hasn't doesn't mean it wont....