Hi, I am also looking to replace the tap with a ball valve.
I bought a 1/2" ball valve http://bryggeland.no/kuleventil-3-deler-1-2-tom.html
I have measured the female thread on the Braumeister at 1" (25mm) so I am going to need a stainless 1" male to 1/2" male reducing nipple and some PTFE tape and then a 1/2" nipple from the other side of the ball valve.
Does anyone know the specifics of the 1" thread on the Braumeister???
Also anyone got the dimensions of the black rubber U seal people use on the two top filters? I bought some of ebay but it was too thick and the plates wouldn't go back in the Malt Pipe!!!
However I used it around both the handles to make it easier on the hands