This House tap water supply plumbing plan shows how to plump your home. The various plumbing pipes are represented by the different colored lines in this drawing. The blue bars represent the freshwater supply coming into the house. Your home's plumbing is divided into two basic systems: one that brings in clean water and another that removes dirty water. Your fixtures, such as sinks, showers, toilets, washing machines, and dishwashers, connect in the middle. Once inside your home, your clean water supply is divided into cold and hot water systems, as illustrated in the House tap water supply plumbing plan.