The answer to 'types of drain' is that there are several common types of drains used in homes, each designed for specific purposes. The most common types include sink drains, shower/tub drains, floor drains, and main sewer drains.
Sink drains are typically found in kitchen and bathroom sinks, and are designed to remove water and debris from the sink basin. Shower and tub drains are installed in the floor of the shower or tub to allow water to drain out. Floor drains are found in basements, laundry rooms, and other areas to collect and remove excess water. The main sewer drain is the primary drain that connects all the other drains in the home to the municipal sewer system or septic tank.