I meant actually using a nylon bag inside the malt pipe. That makes it easy to pull the first set of grains if you are doing a reiterated mash.
And yeah, I would just worry the grains and bag would get sucked through the hole a bit without the bolt, and if the bag tore, you would then lose containment within the malt pipe.
And yeah, I would just worry the grains and bag would get sucked through the hole a bit without the bolt, and if the bag tore, you would then lose containment within the malt pipe.