OK so I took about 5 minutes to redraw the initial step 1 with a different paint program just to give a rough idea of what I was thinking of.
A few changes. First there would be 3 configurations, prep, mashing/sparging/boiling, and cooling. Each of these would require some moving of hoses etc. Since I want to make everything the SS QD's this should all work out well. The initial configuration would look like the one above. The major difference is that we would move the sparge arm and connector from inside the keg wall to inside the lid or in the center front/back of the keg. This is so either the Kettle or the HLT can easily connect to it.
The coil would be disconnected from the MLT in and the output of pump 2 from the kettle would connect to the MLT in insead. The Kettle would be used to provide strike water and filled with water first to get things progressing faster. When the HLT has water filled and hits the target temp then the recirculation could begin as shown previously with one simple hose change.
I also changed the water filter configuration. Putting two valves on the filter would allow us to mount it down lower by the pumps and then run two separate connections to the IN ports on both the Kettle and HLT or use one valve and manually switch the hose.
So basically if I keep all the connections a standard 1/2" male QD on all the equipment then I can always connect any part to any other part with the same tubing.
Boerderij, so let me get this strait. Instead of sandwiching the keg on either side with an O ring and a SS washer, you have a SS washer inside with no O ring and a O ring on the outside with no SS washer, just a lock nut, and this works fine?
You dont need a O ring on the inside and outside? The lock nut does not need a washer and does not chew into the O ring?