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".
If you need an emergency drain repair, toilet repair, or some other plumbing job completed you'd be better off to go online and find a proper business. The best businesses are almost always ranked towards the top because Google is so accurate with their searching relevancy. So if you type in your city and the word plumber you will be given the best in your area!
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 local plumber for the job to be in code.
Leaks can come from so many sources, so you know that this is going to take time to locate and rectify. At least in this case there Trustworthy plumber is actual evidence that can be tracked. A hidden leak can drip on and on for a long time, silently adding money to your water bill.
Call a Local plumber to set up an appointment for an inspection. You will need to be home for this service and when the work is complete, you want to be available to find out what the professional found out. If there is work to be done, depending on the severity, it might be a good idea to go ahead and schedule the next appointment for repairs.
As precautionary measure, you have to tell all your tenants where their individual water shut off valve is located, as well as the entire building's so they can turn it off in case of emergency. And don't forget to make them accessible. It won't do any good if they know where it is but it's locked and they can't break in.
Most importantly, make sure that you set your foot in a reliable and trustworthy store which also offers great discounts or sales for you to be able to save.