My last reply was more like a second, but related, question. Perhaps the exact meaning was lost in translation. In my second question, I wanted to know if any air in the pump will naturally rise into a tube attached to the fill port if the fill port is facing upwards. If this is the case, it may be useful to mount the pump with the fill port facing up to trap air in the connected tube that could be routed to a bulkhead on the case. This could be helpful for SFF builds with no reservoir, for example.