I need to move my kitchen sink (and dishwasher and disposal) to an outside wall. I determined I have enough room to provide a 1/4" downward slope per foot the drain travels. The supply seems simple enough. I understand I need to insulate pipes on the outside wall. I do not know what is required in moving the vent lines. Can they go horizontal 11 feet including around a corner? Even if I put a new roof vent above the new location, I can't vent straight up because it will be in front of a window. One suggestion I got was to use the mushroomy thing used in trailers but I fear that might stink (and is illegal?) Thanks for your help.