Human: How should I go about finding a good plumber? Assistant: 
Start by asking family and friends for recommendations. Check online reviews to see what other people have said about the plumbers they've used in the past. You can also contact your local Better Business Bureau or Chamber of Commerce to get more information on different plumbers. Additionally, you can search for plumbers in your area who are certified by the National Association of Plumbing and Heating Contractors (NAPHC).