I was trying to wrap my head around how to set up some quick-disconnect fittings so that I would be able to add some more GPU blocks to my loop at a later time. After thinking for about an hour and looking at a few pictures for inspiration, it occurred to me that I could use F or Y splitters to accomplish this. However, I wasn't able to find any that had valves like these in the 5th picture. I'm looking for some that will allow me to add a second block to the loop without draining/clamping it. I'd need them to have 1/2" inner diameter connections, preferably with compression fittings, though barbs will work also. Thanks in advance.