What if the plumbing has been winterized?
If a house is vacant during the winter, the seller will often have the plumbing system winterized. This means that the system has been drained and antifreeze has been added. Winterizing often includes loosening of various plumbing fittings. Because of this, one should not turn the water back on until the system has been de-winterized. De-winterizing is usually done by the same person who did the original winterizing. Make sure that the plumbing system has been de-winterized prior to the Inspection, so that it can be thoroughly inspected.