Hi guys, I am fermenting 5,6 gals of an IRA in a 6,6 gals fermenter wich has a screwcap.It is the first time I use such a fermenter so I would like to ask you if I am doing things well.I started fermentation leaving this screwcap loose to let gas get out, covering it with a tin foil. Now 6 days later fermentation is almost done so I would like to know if I should close this cap hermetically or not. Many greetings
Here : http://articulo.mercadolibre.com.ar/MLA-508608490-bidon-25-lts-fermentador-madurador-con-canilla-_JM
I think if I had a fermenter with a screw top, I would install an airlock. I would want to avoid back pressure until attenuation is finished. But if attenuation is done, I think you could certainly seal it. That's pretty much like doing a secondary in a keg, at least from a pressure standpoint.
I'm with Vikeman, I would close down once done, and then drill it for a stopper and airlock before next use.