A bathroom has several sections of pipe in the toilet drain system and each has been standardized to make installation simple and consistent. Bathrooms have a corner cabinet, a drainage pipe and tube connecting the cabinet to the main drain line of the house to drain. All tubes are generally the same size.
Soil pipe sizes
The pipe section extending down wardly from the flange, where the toilet is mounted on the floor, is called soil pipe. This tube is always oriented vertically and always connects directly to the flange. The average soil pipe is 3 inches (7.5 cm) in diameter and is usually made of PVC (polyvinyl chloride). Not all bathrooms have a tube from the ground, but most residential drainage systems have it.
This section of pipe connecting the flange having an opening of 4 inches (10 cm) diameter and exit of 3 inches (7.5 cm) diameter to the bend of the cabinet, the next toilet sewage pipe in the set drainage. Most soil pipes less than 2 feet (60 cm) long, but lengths vary by installation.
The bend of the cabinet is a piece of tube with a 90 ° angle only at one end. Normally it has 3 inches (7.5 cm) diameter, since it is connected to the drain, which is the same size. Most cabinet corners have a straight length of pipe after the bend leading to the main drain line. The length of this straight pipe is usually between 1 and 2 feet (30 to 60 cm) long. These pieces come in all sorts of configurations to suit almost any plumbing situation.
Main drain line
After corner cabinet a number of sanitary sewer pipes that go straight to the main drainage network of the house, also called the battery drain, or the main battery. This tube is also of 3 inches (7.5 cm) diameter, but may be higher in some homes. The normal drain pipe is always 3 inches (7.5 cm) in diameter unless there is some reason to be larger, as an excessive burden to drain. The main drainage lines may include a series of elbows, bends or joints to connect additional drainage lines on their way to the main drain.
Other pipes and parts
Some additional pipes are needed to probe in a bath including power lines, the feed tube and flange. Typical toilet flanges are 4 x 3, which means that the top is 4 inches (10 cm) wide and the bottom is 3 inches (7.5 cm) wide. Supply lines passing through the bath are usually copper or plastic and 1/2 inch (1 cm) in diameter. This is the size of the supply lines in most homes today. The feed tube is smaller, usually 1/8 inch (3 mm) in diameter and about 1 foot (30 cm) long.