Leak detection experts generally charge by the job or buy the hour. Because of the specialized equipment and expertise required for leak work you should be prepared to pay a little bit more per hour for leak detection services than you would for most regular pool service activities.
Once a technician is at your pool, the first step usually involves a pressure test of your plumbing lines to confirm whether the leak is in the plumbing or the shell of the pool. This testing will be done with specialized test plugs and pressure induction systems that are designed to give quick results.
Based on the results of the pressure test, the technician will then use a variety of tests involving sophisticated electronics or diving equipment to pinpoint the pool leak. Pool leaks are a seasonal problem in most parts of the country and those who are good at finding leaks are usually very busy.