A friend of mine is having a problem with getting heat to her upstiars. She has a forced hot water system with two zones. Recently her father helped her moved the copper pipe going upstairs through her kitchen, he was not able to get the heat upstairs after doing this. I went over and tried purging the stysem with a hose attached to a spicket that is located right after the circulator. I was able to get the hot water into the line at the boiler but still had not hot water circulating upstairs. Anyone help me?