I have a ventilation pipe coming off the top off a stack. Unfortunately it emerges out of the floor then turns to the wall - once inside the wall travels up to the loft. This was fine because there was a bath sat over it keeping it hidden. We are looking to replace the bath with a shower tray so I need to move the venting pipe. Can i have the venting pipe come out of the toilet soil pipe just off the stack instead - so I can keep it below the floor before it enters the wall?
