Originally Posted by aeldien
I am searching for an explanation to an issue which resulted in water damage to my hardwood floor. When I left my home 3 weeks ago I shut the valve on my main water line at the street. When I returned home 2days ago I opened the valve and noticed that the city had installed a new water meter. When I entered my home I discovered the rug on the floor in front of my dishwasher was damp and damage to my hardwood floor in that area. I opened my dishwasher to find water in the bottem.
Soon after I also noticed water in my cloths washer. I have since run both
appliances and they seem to be fine and there is no leakage in the fittings. (I did not leave either appliance on when I left the home)
So what happened? Is there a connection to the installation of the new water meter? Is it possible that the water pressure was too high and somehow caused the valves on these appliances to release water into them? Has anyone had this experience?
thanks for the help
When you shut the valve on your main water line, did you turn your water heater off? Do you have a thermal expansion tank by your water heater? My guess is that you didn't turn your water heater off and that you don't have an expansion tank installed.
If you didn't turn your water heater off and you don't have an expansion tank installed, that's the reason for the flooding.
When you shut the valve on your main water line, you created a closed system. When the water in your heater heated up, the water expanded. Water cannot be compressed. There was no where for the water to go except find the weakest links in your plumbing and leak out at those points. The leaks can happen from either hot or cold water pipes since the increased water pressure affects your "entire" plumbing system.
With the valve on the main water line open, as it normally is, when water heats up in your water heater, the expanded water can be forced back toward the city's water system. With the main valve closed, that couldn't happen.
If you had an expansion tank installed, the expansion of the heated water could go into the expansion tank and not cause leaks in your system.
If you don't have an expansion tank installed, whenever you shut off your main water line, either turn your water heater off or open any faucet. That will prevent similar leakage from happening again.