Hi - I'm about to plumb in my new ensuite. It will be a toilet, basin and shower. My current plan is for the the basin and shower wastes to go directly outside and then into the existing soil stack with a boss (on separate bosses). The toilet soil pipe will go directly out, through a 90deg bend horizontally and then into the existing soil stack. I was wondering if there is any downside to putting the shower and basin waste into the new toilet soil pipe which will have a 2 meter run horizontally along the outside wall before it goes into the existing soil stack. I am trying to avoid getting gurgling from the shower or basin - and was advised not to join them up inside the house before they reached the larger soil pipe. Thanks for the help!