Venting is one of the most important components of waste plumbing. There are numerous advantages of such a procedure. It allows air to be pushed out of the way of the water flowing through the waste pipes. A good venting system is also important to allow air back into the waste piping system after the water has gone by and sewer gases to escape outside through a venting stack. A plumbing stack vent is essential in all homes due to the numerous advantages offered by the system. But many homeowners wonder how to install plumbing stack vent on a shingle roof. Here are some important tips to consider when you decide to install plumbing stack vent on a shingle roof.
Even though the stack vent in your home may have a slightly different configuration than other homes, all of these vent systems have similar structures and serve the same purpose – which is to dispose of waste in a hygienically manner and prevent sewer gases from entering your home. All the drains will connect to the main stack in every venting system. In fact, the main stack is a vertical pipe that starts from the sewer and goes through the roof. The installation process is governed by the relevant building codes in your area. The right type & size of pipe that should be used, venting distance, and maximum/minimal slopes are determined depending on the relevant building code in your region. Even if you decide to DIY, you may require the services of a licensed plumber to inspect the system before you finalize it. A licensed plumber will give you the green light to go ahead if the system is in accordance with the building codes in your region.
Installing a roof vent through an asphalt shingle roof is not an easy task. The stack vent is a vertical ABS pipe that comes with a 3 or 4-inch diameter. It ties to the sewer with the right Wye fitting or sanitary tee. There should be a 3-4 inch waste line from each toilet to this stack. You can tie the drains (from bathtubs, showers, sinks) to a toilet waste line or directly into the stack. If your roof is 9/12, you should drill a 3 1/2″ hole in the shingle roof to install plumbing stack vent on the roof.
The article above provides information on how to install a plumbing stack vent on your shingle roof.