Q. Do I need to be home for you to perform the blowout?A. That depends. If your water shut off is outside and everything is accessible to us, you do not have to be home. If your water shut off and drain is inside and you want us to drain the downstairs pipe and shut off the water, then you do need to be home. If you can shut off the water inside the house and drain the downstairs pipe yourself then we can winterize the system from the outside and you do not need to be home. We have instructions on how to drain the downstairs pipe on the website.