What is the best way to balance two units running on a single SCW? I have a 5 ton and a 2 ton running each with their own thermostat through a single water feed. I have tried to balance the flow with both systems running simultaneously to provide the minimum amount of flow required during that time. When only one system is on then there is a lot more flow to it since they both feed from the same line. Should I separate and run a line to each independently? There are ball valves that I can turn to adjust flow.