Add after company response: insurance most cases does not cover any expenses if it's a slow leak due to overtime wear and tear. Google and read this before you spend big money thinking this will be paid by your home insurance. It only covers if it's a sudden damage caused leak, like an accidental puncture into the pipe. Disclaimer first: This review is not about their service but just want to give people an idea what you are getting into when you call them and what options you may have. I had a slow tiny water leak from upstairs to downstairs. I knew this is not something that I could detect and I felt I needed to pinpoint the location before calling the plumbers. I called this company and got a straight answer, "$850 to come out". If you have a serious water pipe leak under a concrete floor or sewer pipeline under the dirt, it may warrant this kind of charge but I personally think $850 for an upstairs to downstairs straight leak detection is too much. Again that's just my own opinion. I hang up and called my go-to plumber, Tech City Plumbing and Drainage in Kirkland. Tim came out the same day and pinpointed the leaking spot in 10 minutes and provided me the estimate of fixing it. Not cheap to fix it but I didn't have to pay any extra for Tim to detect the leak. He even told me to get a second bid on the cost of fixing it. I've used Tech City multiple times including expensive rerouting water piping, etc. They are very experienced and skillful and fair priced. Don't hesitate to call them. My point is sometimes an experienced plumber can save you a lot. If you have an under the concrete or under the dirt leak, call around and get your price straight first.