To my horror last summer, I received a water bill of over $1000.00. I almost had a heart attack. I then proceeded to check all my faucets, toilets etc in the house. Nothing! I then checked the hoses outside as well as ran the in ground sprinklers. I didn't notice anything. I then looked at the water meter and saw it continue to move! I turned off all the water in the house and outside. I didn't know what to do. My last resort was to call Richmond Hill sprinklers. They have serviced the sprinklers since I moved into the house 4 years ago. The previous owner had installed the sprinklers. I cant recall the fellow who came over immediately... he checked all the connections etc. He didn't see the cause. He then had a special tool to check moisture / leaks below ground level. He found the pipe that was damaged. It was damaged when the previous owner had someone do water proofing around the outside of the home. He dug down to find the pipe, replace it and put all the soil and gravel back. All that searching and repair for a very minimal charge. AMAZING!!!!!!!!! These guys are the best!