A kitchen plumbing diagram depicts a complicated network of water supply pipes, drain pipes, vent pipes, and other components. Because plumbing is a complex system that is one of the most expensive to repair or install in a home, it is important to understand how it works. Understanding the concept of a plumbing system allows you to understand the types of problems better. If you are planning for a remodel or new home, a Kitchen plumbing diagram can help[ you in designing a system that will work properly to pass plumbing codes. In major plumbing work, consider the following: A properly designed system will efficiently deliver water to the various faucets, fixtures, and water-using appliances while also carrying wastewater away without clogging.