Ask about prices, but keep in mind that the cheapest plumber isn't always the best. You should be able to know the price before they start. Ask about regular rates and if there are any other service charges, like dispatch fees & after hours fees.
A Trustworthy plumber will answer all of your questions. Good plumbers will provide you with references, and tell you how long they have been a plumber, and the type of guarantee they provide for their work (warranty.) As well, a professional plumber will offer emergency service for nights and weekends. You should be able to make contact with him or her in a timely manner. A professional plumber will also have all of the appropriate insurance such as liability insurance so that you are protected in the event of an accident.
The first thing to know is that these folks can be very hard to find. A good service person is like a needle in the haystack, or so it sometimes seem. Average plumbers, those who install fixtures, are much more common. But the ones who come to fix up the horrifying messes that can be caused by faulty plumbing are almost heroic.
Once you have received your certificate after the completion of the online plumbing course, you can do the same jobs as any other plumber. You can act as a basic plumber or move on to work as a plumber in the construction business.
He continues to review the scene of destruction, occasionally muttering "Hmmm" under his breath. Somehow I intuitively know that every hmmm is costing me an additional bathtub replace fifty dollars.
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.
Certified. Just like any other professional, a plumber comes with a certification. Make sure that you hire someone that is fully certified as a plumbing specialist. Never assume that all plumbing companies that offer these types of services come with a certification. Do your research.
Even if you have not noticed a problem with your sewer lines, consider calling in a plumber for an inspection. If there is a problem, set up an appointment to have it repaired right away. Remember that replacement can be costly but you can save money by going with a company that will avoid trenching the yard.