Originally Posted by richab
So you just drill a hole and add valve to make a MLT?
It's about that simple. I'm actually planning on using this one for an HLT, but will run some heat retention tests on it to see if I need additional external insulation. The walls on this one seem to be a bit thinner than the cooler I used for a MLT.
You can go about the valve in a ton of different ways, and I originally built my MLT using the information in Flyguy's thread but then upgraded to a ball valve similar to this one
and sealed everything up with a bit of food grade silicone. I also used a bazooka screen on the inside. If you decide to buy ball valves online, I'd recommend shopping around as Northern Brewer's are pricy.