I thoroughly inspected my 15.9 gal fermentors the other day. They are well built. The lid is awesome and easy to remove plus if I did a fruit beer I could drop a whole watermelon through the top! Everything has rubber orings for seals and the air lock is huge and impressive. The little racking spout is pretty nice and I think it it might be perfectly positioned for pulling above the yeast cake. The handles are substantial but I don't think substantial enough to move a 15.9Gal fermentor when its full, no that I'd want to move it anyhow. I will probably need to get a hand truck to utilize these fermentors. I sort of intended these for large batches of saison or other low gravity brews. I might just primary in two 10 gal cornys that I have and then transfer into the 15.9 gal for the brett to finish up in secondary. I may need to get a larger brew kettle......
The questions I have is about the oxygen permeability. I couldn't find any answers but I am thinking that speidel is similar to flex tank. I am sort of leaning towards these being a similar construction to a specified permeability to simulate wine barrel oxygen transfer. I can't find any numbers or claims other than "resists oxygen transfer". I'll brew up a big batch of Flanders red soon and get it in one of these and see how it goes.
The questions I have is about the oxygen permeability. I couldn't find any answers but I am thinking that speidel is similar to flex tank. I am sort of leaning towards these being a similar construction to a specified permeability to simulate wine barrel oxygen transfer. I can't find any numbers or claims other than "resists oxygen transfer". I'll brew up a big batch of Flanders red soon and get it in one of these and see how it goes.