Vent Drain Pipe In Attic

Only two plumbing set ups could require sewer pipes in the attic.

Vent drain pipe in attic. It s called the p trap and it starts the sewage ventilation process. In many an older home this drain pipe is perhaps 4 inches in diameter and stays that size all the way through the roof. If you don t have any other plumbing in the attic then the pipe running through it is the main vent stack. Thats pretty much a no brainier.

Instead they serve to equalize air pressure within the dwv system and also release sewer gases into the outdoor air as all vent pipes terminate through the roof. Or even a better idea cap them lol. It also allows fresh air into the plumbing system to help water flow smoothly through the drain. The vent pipes remove or exhaust sewer gases and allow air to enter the system so that the wastewater flows freely.

Just as drain pipes remove water and waste from your home the plumbing vent pipe also known as a plumbing air vent removes gas and odors. If the drain lines in your home have poor venting as in figure a for example water rushing down the drains will pull water from nearby p traps. Vent pipes look like sewer pipes. Pipe it out the roof.

The first would be a bathroom or kitchen in that part of the house and the other would be a. Understanding the plumbing vent. You ve opened up the cabinets under a sink before to see the p shaped tube directly underneath the drain right. If the vent wall is opposite the drain line use a reducing y and a street elbow.

The drainpipes are made of cast iron galvanized pipe copper or plastic. These drain pipes connect to. Toilet vent option 3. If the vent wall is parallel to the drain pipe install a 45 degree reducing y and a street elbow to point toward the wall.

A plumber would probably know the answer to the vent issue but would he know or care about other associated retrofit issues. Visualizing the pipes inside your wall is made easier if you start from where you can see. A full sized vent is a primary vent where the drain line transitions at some point and becomes the vent pipe that exits the roof. The plumbing vent also known as a vent stack helps regulate the air pressure in your plumbing system.

You may need another elbow of any degree to position the vertical vent where you want it. As water goes down a drain air is needed to equalize the pressure in the drain line. This is the purpose of a venting system. The vent pipes are part of the drain waste vent or dwv system of a house or building and they do not carry water inside them.

Local building codes that regulate the materials used in the dwv system have changed over the years so most older homes have a combination of materials.