Unknown leak upon arrival. Customer stated their water bill has doubled in the last month. The city came out and informed customer they had a leak and would need a plumber out to fix it. After isolating water to just the yard found meter still spinning. Informed customer that their leak was between the meter and the house. Looked in the yard for noticeable wet spots but did not find any. Informed customer we could replace the line with a warranty or they could have leak detection out and we could come out once the leak was located to repair it. Left customer with all estimates.