DIY Doctor UK DIY Forums

wondering if anyone can advise me how best to drain the condensation traps in my ensuite airvents. water was driping into the ensuite through the inlet and outlet vents so put condensation traps in but wonderign if I can drain the condensation traps inot the waste vent pipe in the attic or do i need to run the pipe to outside? If its needs to run outside how do i do this, is it easy?
many thanks in advance