Here's a pic on the T-pieces....
Its made out of 1-1/2" Sch80 PVC - Sch40 isn't thick enough to turn the O-ring grooves without seriously compromising the strength of the pipe.
The T itself will have two 1-1/2 x 1-1/4" bushings inserted, which then accept 1-1/4" hose barbs for connection to the scrubber can and mouthpiece. The MSR bags are an OTS setup. I'm waiting for the drysuit add valves to get here to put those pieces together, and I may add a 45 degree elbow off one or both of the T-pieces going back to the scrubber can to optimize the "exit" direction - thus, I haven't cemented them up yet.
The "stick" piece is just a piece of pipe into which I turned two O-ring grooves. The piece actually uses THREE O-rings, two thicker ones which seal on the MSR waterbag throat, and one thinner one above the two visible ones that acts as a crush seal and prevents withdrawal of the tube from the bag. The ring is the cap from the MSR bag with the center cut off on my lathe - I chucked it in and took a cut-off tool to it, then smoothed the edges (it doesn't cut cleanly as the plastic is REAL soft) with the dremel.
The piece sticks down about 1/2" into the bag to prevent its complete collapse when there is still air in the lung.
It cannot be rotated when in the bag, but that's ok..... its very solid in terms of a seal and I can pick up the entire kit mocked up by the T-pieces (all fastened up to my BP+STA+Wing setup). In my testing for pressure tolerance I exploded the MSR bag before the T-piece failed or leaked....
That ought to be good enough!
There is a sectioned piece of PVC cut and glued inside the T-piece that forces the air down so as to provide the water trap function - it cannot go straight through the "T"'s top, but has to go down and then back up.
