A plumbing system is responsible for bringing running water into a home and removing waste. A home plumbing system is broken down into two subsystems, each with an important job. One brings fresh, drinkable water into the home. This subsystem is pressurized so that once water enters the system, it can reach all the sinks and plumbing fixtures in the home that need to use it. The other subsystem removes wastewater and takes it to the septic tank or municipal sewer system so it can be disposed of or cleaned and recycled.