So I built a new mash tun, I needed a bigger one. Well I tried to make it the same way I made my last one by just sticking a 1/2" tube through the spigot. Well it leaked. I took the spigot out and put all brass coupling through with two washer seals and a ball valve on the outside. It still leaks a bit. I tried putting silicone around to help seal it up, worked great for about a half hour and then the silicone came free. Then I noticed you're not suppose to put silicone in submerged water. Anybody have any suggestions for a different kind of seal or sealant to use?