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.
So I started calling plumbers. And there was one name that immediately came to mind: Godot (not his real name). I have lived here in Gilford for eight years and have seen his advertisements at least daily ever since I moved in. His ads are in the local papers, on the local internet sites, he's got an expensive full page ad in several telephone directories, I believe I even received a personal direct mail piece from him when I bought my home.
Certified. Just like any other professional, a plumber comes with a certification. Make sure that you hire someone that is fully certified as a emergency service specialist. Never assume that all plumbing companies that offer these types of services come with a certification. Do your research.
Check on the plumber's licensing and insurance. You can ask about this over the phone before you even make an appointment. If the Trustworthy plumber, or his representative on the phone, cannot provide the master plumbing license number quickly and easily, that's your cue to move on.
If you have to call your Local plumber to do work such as renovating your kitchen or bathroom, purchase the parts yourself directly from your plumbing merchant. You can often save considerable money by buying this way, and most plumbers are happy to supply you with the information to enable to buy the correct fixtures for your job.
Before you hire a plumber, ask questions. Find out what kind of experience they have and if they offer service 24 hours a day. You can prevent many problems by fixing a plumbing issue before it gets worse. You should also find out if the contractor is reputable and check their references. Compare plumbers until you find one you can trust.
Once you have become a master plumber you can start your own plumbing company or you can even work for the government. This may sound like it is going to take forever to become a master plumber and it is difficult to achieve this level but it is not. Yes, it is going to take several years but the prestige title at the end is worth it.