Tee into boiler condensate pipe

[leescortxr3i]

Hi all. I'm installing a bathroom extractor and ducting into my loft area and as part of the ducting in putting a condensation trap just after the fan. It has a 22mm pipe connection on it and I was wondering if I could conveniently tee this pipe into the boiler condensate pipe which runs out of the fascia? Didn't know if the operating of the fan could cause a slight suction and pull any gases from the boiler via the condensate pipe? Or if the fan is off, any gases could find their way into the bathroom? (Apologies if this is a silly question!)
Regards
Lee

 

[terryplumb]

Run a separate pipe. The condensate pipework from the boiler is not an option.