I know this thread centers around a 15 gallon setup but the concepts are the same just on a smaller scale. Here is the update on the 60 gallon:
Alright it is all sealed up. I will do some basic pressure tests once the sealant has had ample time to cure (moving liquid in and ensuring the air locks bubble away as that is about as much pressure as the lid will ever have to sustain). The FDA sealant says no VOCs... yeah right - it gives you a good buzz...
I went with twin airlocks just to be safe. I'll have to use blow off tubes during the initial 60 gallon ferment but should only need the 2 airlocks each year when 15 gallons are added. The SS 1/2" valve with QD connects to a 20 inch deep 1/2" ss tube that will allow siphoning or addition of liquid (it reaches 25 gallons down into the product). Any more than 25 gallons can be removed from the bottom.