Just built an extension, with cloakroom on outside wall, had a new soil pipe put into the ground/ oversite and linked properly into the main sewer. Left the outlet open on surface. Now can we fit a toilet straight to that or do we need to have some sort of vent pipe?? This is a totally different soil pipe to the main house one. Am worried there isn't enough room in the corner where we have the pipe coming from the ground to put any soil stack/vent? Can they link straight to the soilpipe that leads to the sewer? Sorry if this sounds really stupid but I am a DIYer and builders got us this far so hope what they've done is right.