Originally Posted by tommymac
I am going to be drilling out an opening for my 10 gal mash tun/cooler I plan on drilling a 7/8th inch diameter opening. Now instead of making a valve I am just going to use a predrilled stopper ( I also need to figure out what size it is) I have one at home already but will need a second one.
So my question is what do i need to do to seal the inside part of the cooler to prevent liquid from getting into the insulated part of the cooler?
If I'm visualizing this right...you're just going to use a stopper to plug the hole?
If that's the case, placing the stopper in from the inside is what you want to do.
That way the stopper is sealing the inner wall and you don't have to worry about sealing the outer wall.
I'm not sure why you're drilling the hole bigger though. There should be a pre-drilled stopper that fits the valve opening.