I may be a good idea to replace the main water shutoff valve. I don't know what it would cost to replace all of the valves, but it will not be cheap. Also, it would probably not be worth doing. With 2 bathrooms and a kitchen, you probably have at least 9 valves, plus the valves on the washer, water heater, and refrigerator. If you have a leak, you can always shut off the main valve. I would suggest buying some First Alert water alarms to place under toilets, in the water heater drain pan, and near the washer. They will sound an alarm if water gets on the floor. You can get a pack of three alarms for $30 on Amazon. Cheap insurance.
|