When interviewing plumbing contractors prior to awarding your project, ask each contractor to give you a complete rundown of their safety, ethics and quality assurance practice. Also ask to see proof of insurance both for your property and for the people who will be working on your property.
When in the market for a plumbing contractor make sure you know what you are looking for. Plumbing contractors can do a multitude of things. They can help to change all of the pipes in your house to redoing your bathroom. However, keep in mind the task as well as the type of plumber you will need.