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.
If your service provider has adequate knowledge and training on the topic, this might be a good time to find out more about energy alternatives. He may be able to install low-flush toilets and lower-output shower heads. This is also a good time to talk about solar thermal water heating, though perhaps before the roofer is finished up top.
As you can see there are some things that you can do to make sure that you are going to get the best plumber for the job that you need. These tips should help you and leave you feeling better when it comes time to hire someone knowing that you did these things and you garbage disposal feel that you are going to get a good job.
Trustworthy. The best way to find a Trustworthy plumber is to ask a close friend, family, or a good neighbour for recommendations. They're the best people to ask because they've experienced the services first-hand and they will never lie to you about it. This works in the same way they won't let you hire someone who has worked for them and delivered bad service.
Preventative care is what is needed here such as using commercial products for unclogging a drain and wrapping your pipes and having them insulated. You may also want to invest in drain covers for your drains to catch hair and grease before it becomes a problem that warrants the call to your Local plumber. If you have pipes outdoors that have hoses, before fall sets in, disconnect these hoses and bring them indoors. This is just some of the preventative maintenance that can be used.
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.
Start off with disassembling the faucet head. Inspect each part to see which are still OK and which ones will need replacing. In some cases, you only have to replace a washer or two, which will save you a lot. However, if you have to replace the whole faucet, make sure that you are getting the same model so that you don't have to worry about compatibility and familiarizing yourself with how to use it.