What are the two main plumbing systems in a home?What is the red and blue plumbing pipe called?What are 3 types of drain pipes?Which water pipe is best?What are some potential causes of a slow-draining toilet?How do plumbers fix clogged pipes?Do plumbers clean up after themselves?Will baking soda clear a drain?What are the most important things to know before becoming a plumber?Why do I hear my water pipes at night?