Use the Google keyword tool and type in the name of your product or service. For example, if you are a plumber, type in "Plumber". Google will then list all of the words (aka keywords) that people type in to find a service like yours. You might see common variations like "Plumbing Expert", "Plumber Services" or "Pipe Plumber".
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.
Toilets have a shut off valve that is most often located on the pipe at the back of the toilet. In all cases look for a silver knob and turn it to shut off the water. A clog professional can help you locate these valves if you encounter a problem finding the valve or want reassurance you are handling it correctly.
If you still are not lucky in finding a good local plumber, contact your local plumbing store, they can help you in recommending a reliable and Trustworthy plumber in your area as they deal with them every day.
Third, if you dissemble things, do you know how to put it back and not cause further damage? This is something that commonly happens. Some people attempt to fix the problem and end up causing a lot more damage! Then they try to do something else, which causes even more problems and by the time they call the Local plumber, the problem is much worse and now, they not only have to pay for the service but may even to pay a higher amount for the double repair.
Before choosing any plumbers in your area be sure you pick a contractor that has experience with similar projects as yours. Plumbing in your area isn't the same as say New York or Chicago, unless of course you are from one of these cities. Ask for a reference or two for plumbing jobs that they have completed in the past.
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.