Hi there. I just moved into a new home and got hit with an incredibly enormous water bill. I checked my water meter and could see the little dial moving - not all the time but every 10 seconds or so it would move forward. Sometimes it moves backwards but never enough to make up for the forward movement. I have made sure all water is off in the house and have done visual checks for leaks as well as a dye test in the toilets. I called a plumber over and he said this motion is caused by the expansion tank on my water heater. Low and behold when he turned off the expansion tank the motion stopped completely. He told me that this is normal for expansion tanks to cause this motion - however he said the movement forward and back should be equal. I have not noticed this. Can anyone verify if their expansion tank causes the same forward motion on the meter?
thanks so much.