The seal can be damaged during assembly, just as any o-ring on any fitting can be misplaced. Thats why you need to read users guide, and always check everything for leaks
However this is not our support center, and we do not want it to be.
C-Systems has a support staff, and if you need help contact them directly please.
Hell, I'm not even in Canada right now, have only I-net sometimes, so no position to help, and will not be for weeks