Ask around. Ask your friends, ask your neighbors and get referrals. Nothing is more powerful than the testament of someone who has had a local plumber in their home and can speak to his/her capabilities.
An unqualified plumber will charge usually high service fees and provide substandard service and poor quality parts. After the plumber has completed the job, check the work. You can check to see if everything is put back together and there is no mess on the floor. As well, you should turn on the taps and flush the toilet to see if everything is running properly.
Good plumbers are going to have a valid license that you can check on. Look up the number they give you online and see if it is valid and if any complaints have been filed against that number. This will tell you if they are at least good and have not done anyone anything wrong. Some of the best plumbers are going to know and understand the local building codes and will be able to explain to you what is needed running toilet for the job to be in code.
Ask for written quotes and compare the quality of their services and rates. Lower rates are not always the better choice. Sometimes, those plumbers who offer lower rates provide low quality services and materials, too. Written quotes are also important to give you an idea of what the Trustworthy plumber are going to do and how much are you going to pay for those services.
Before you call a plumber to come and do a job for you make sure that you do a little bit of research on the company. You do not want to have a job done by a Local plumber who does not know what they're doing. That is simply asking for problems. The job ought to be done by someone who is able and qualified to do the job, not just any Joe Soap on the street.
There's water all over the floors and the basement is flooding, it is time to call someone to help with your plumbing situation. With water going everywhere, you don't have time to look around and figure out what happened and how you can fix it. When a problem arises that creates damage to your home or the area around it, you want to make the call for help. Let an expert come in, attempt to stop the flow of water, and begin to diagnose the problem.
In short, the emergency plumber you hire should be from a reputable company. If you think that you can rely on him then you should look for another one. An emergency plumber should be skilled and should be able to deliver quality services to everyone.