In the absence of water being supplied to a winterized home, a pressure test checks the supply plumbing integrity. This consists of connecting an air compressor to the water piping, typically at the laundry faucet or exterior sillcock, and pressurizing the pipes to about 60 psi with air. This is similar to the water pressure that most homes will have from the street. Although the limitations of this test include: 1) leaks not being detected at drains or 2) plumbing fixtures, we will be able to determine if the supply lines leak. Also, we are often able to determine the location of the leak, all while prevent costly water damage.