How big is the main drain line in a house?

Usually 4 inches in diameter, this pipe might be either ABS or PVC plastic, clay, or cast iron. The mainline is rarely visible since it usually runs under the home’s basement or foundation slab. You will probably see this drain line only during major repairs or additions to the system.

Where does the floor drain go in a home?

In a residential home, there are two possible places where the floor drain goes. #1. The most common set up in a residential home is that the floor drain connects to a pipe that will remove the wastewater to a main sewer system underground that is shared by other homes in the area, or to a separate septic tank located on the property.

Where is the main drain clean-out fitting located?

Sometimes the main clean-out is located in the floor, while other times it is a wye-fitting or tee fitting mounted at the base of the main soil-stack in the house. In larger homes where more than one main line runs out to the municipal sewer service, it’s possible there will be more than one sewer clean-out…

What kind of drain is in my basement?

I have one OPEN drain close to the stack (cast iron). I think its connected to the main sewage line, because when the p-trap dries up, it really stinks! I also have a COVERED drain? (screw cap, sticks about 3/4″ out of floor) in to corner of basement where to old oil furnace was located, and the supply water line enters the house.