Copper pipe connected to manifold, was cracked at bottom had to replace. After repairing copper pipe, valves are not opening fully had to defrost valves. Informed Mrs. that poly or copper pipe is frozen further down the line may need to replace entire manifold, but I am troubleshooting to determine what needs to be replaced. Replaced two irritrol valves and discovered diaphragm was full of ice. Winterized all zones properly. We have completed a thorough winterization of your irrigation system. Please leave all irrigation shut-off valves closed to prevent re-introducing water into your system, which could cause freeze damage. If you notice any water dripping outside, or icicle formations on irrigation pipes, please call us to schedule having your shut-off valve replaced immediately. We look forward to starting up and inspecting your system in the Spring! Don’t forget to renew your annual membership, if you haven’t already! Any necessary repairs or upgrades were identified and re