Soil pipes, or vent pipes, remove sewage and greywater from showers, toilets, and sinks from your home or building. You can usually find soil pipes on the exterior of a building and they connect to sewage pipes underground.
To prevent clogs and other problems, soil vent pipes must maintain a significant downward slope. However, if that is not possible, you will need to install a sewage ejector pump to maintain proper flow.
In the past, cast iron was the most common material for soil and vent piping because it’s durable and fireproof. However, cast iron is susceptible to rust without proper maintenance. Rusting pipes can lead to future plumbing issues.
Today, most soil pipes use PVC because it is durable and doesn’t rust. PVC is also less expensive and lighter than other materials, making it easier to install. Unlike cast iron, PVC is not fireproof, so PVC soil and vent pipes will require more bracing and hanger support to improve support and prevent a collapse in case of exposure to fire.
Installing Soil Vent Pipes
Before getting started on plumbing repairs, be sure to check the building codes for your property. Having this information will give you a better understanding of where you should install the pipe stack. You will also need to decide if you are installing it inside or outside.
Install piping, three to four inches in diameter, and tie it into the sewer with an appropriate soil & vent fitting. At least one foot above the highest drain in your house, reduce the stack to two inches. Install a three to four-inch waste pipe from your toilet and attach drains from plumbing appliances to it.
The Bottom Line
Soil pipes flush grey water from your house or building in a sanitary way and drain wastewater directly to a public sewer line.
Check out our selection of PVC piping. We offer soil pipes, vent pipes, adapters, sockets, bends, and more parts that are lightweight, durable, and easy to install.