just make sure you cap the line before it goes under where the patio is going to be. you do not want to have lines underneath the patio if it can be avoided. capped heads or lines under a patio could possibly leak in the future. also if you just cap the line with no heads on it at all, you run the risk of the line freezing over the winter because there will be no way to blow out the line. just make sure you have at least one head at the end of the line so you can blow it out. you should really consider cutting the line before the patio and installing new heads around the edges of it too. but whatever you do, do not leave pipe under the patio with caps in it , and no way to blow out the entire line.