A: Good luck, Tony. I personally have never heard of any local codes that allow complete indoor venting of a plumbing-drain and -vent system. Plumbing vents are designed to vent the sewer or septic system drains going into a home outside to the atmosphere.

In some cases, according to local codes, an air-admittance valve may be used on a system in conjunction with the main venting and drainage system to cut down on the amount of vent pipes coming up through the roof. However, these vents need to be placed in approved areas, and in some areas may not be allowed at all.

My advice is to meet with your local inspectors or consult with a licensed plumber in your area to get your permit and code information straight. I cannot tell anyone what is allowed or what is not allowed in particular areas since plumbing codes vary from town to town.

I don't want to put up a stink, but if it were my house, I would want all my sewer vents going outside!