Not that I am doubting you, but after I posted my question here I did some more research and came across this statement in the "Digital Total Control Manual.pdf"


The manifold/cell should be installed in a vertical orientation as illustrated in the picture below. This orientation
prevents hazardous gas buildup in the system if the flow switch should fail to detect insufficient flow.




I definitely don't want to create a hazardous situation here. Still stand by your statement that I can install it in a vertical running pipe? Thanks for your assistance.


Regards,

Mark