I punched new holes in my lid and welded more ferules on to it!
One for the blow off and one for the thermowell. I also had a CO2 connection welded onto the 3" lid and a CIP spraying ball onto another



The gas connection will be used for purging but also for connecting a cask breather during cold crashing.
This will ensure that no air will be sucked back into the fermenter when the temperature drops.

My first plan was to weld a water jacked to the fermenter, but for now a simple tube wrapping will have to do. It actually works really good for cooling.

The temperature is then controlled with an external thermostat, controlling the beer cooler and the valve.
At first I was only controlling the valve, but after having something stuck in the valve seat when testing the cooler, I needed a more secure regulation. The temperature of 10 gallons of water in the fermenter droped to 2C over night!


There is one thing I would have done differently if doing it again, and that is to have three ferrules welded onto the lid.
One for gas in, one blow off and one thermo well, leaving the main lid as it is.
