To prevent hazardous sewer gases from invading the home, each fixture must have a trap in its drainpipe and must be vented. A trap is a bend of pipe that stays filled with water at all times in order to keep gasses from coming up through the drain.
The sink trap is always filled with water and used to prevent noxious gases from entering house.
The vents in the water drain system are constructed to eliminate sewer gas and to prohibit pressure buildup in the pipes. The vents come off the drainpipes further down from the traps and exit through the roof. This maintains proper air pressure in the pipes and prevents the transport of water from the traps.
Each plumbing fixture in the home has to be vented. Most often, a house has a main vent stack (the upper most part of the soil stack) with 1.5 – 2 inch vent pipes connecting to it. In most houses, especially single story residences, widely separated fixtures make it unrealistic to use a single main vent stack. In this scenario, each fixture or group of fixtures has its own waste connection and its own alternate vent stack.
I am putting in a larger window and discovered the kitchen drain vent going to the roof is in that wall. My question is can I cut this vent and then reroute it around the window in a u configuration and then tie it back into the ventpipe going to the roof?