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: Im planning to add a 2nd bathroom to our home. : Although Im an architect, I havent been around the : bussiness for a long time so my plumbing knowledge is a : bit rusty. My main concern is the ventilations required : for the new drain net. Basically all the fixtures: Sho- : wer, toilet & sink (in that order) are going to be po- : sitioned along one of the walls. The main drain line is : going to be parallel to that wall, somewhere in the mid- : dle of the bathroom starting at the shower, receiving : the toilet drain, then the sink drain and connecting to : an existing 4 dia line. Since the drain of the shower : and the toilet are going to travel away from the wall, : do I need to ventilate those? and if I do, how it is : done?. Can you recommend any book or publication cove- : ring that topic. All the books on bathroom remodeling : are not specific on this issue.Each plumbing fixture needs to be vented. For an explanation go to: http://www.terrylove.com/faq.htm#ventIf you email me I can see about getting some more info over to you. Terry Love