So i know this has been gone over 100 times but unless im an idiot which is possible everything anyone is posting just refers to matching up the pump to a different housing. i have what i believe to be a s4 t2 keg, i also have an s5 pump and housing which seems to be able to bolt up to the s4 keg. unless i have an s5 keg and dont know it ( not sure how to really know because its bare). regardless cant find a. s4 housing anywhere so i ordered all the gaskets for the s5 pump and housing and ill see if i can make it happen. has this been done or is the extra bolt difference just the pump to housing bolt and doesnt matter when the housing and pump series match? cant even find an s4 housing picture to reference to help me figure out bolt pattern and which ones are through bolts and which are just pump to housing bolts.

 

Easy way to tell what keg you have is by looking at the flywheel inspection plate. If it has 1 bolt, it's an S4. 2 bolts, it's an S5