Take a look at my equipment and tell me if you think I need to run the water features when the pumps antifreeze is kicking on.. if that's the case, I'd need to ramp up the speed quite a bit because when all valves are open nothing comes out of the waterslide unless I turn the pump up to almost 3000 RPM. If I close the returns I can run the features at a much lower speed, which is what I do when I'm actually using them for a purpose, but with ALL valves open, there just isn't enough flow to service every return and water feature without running at a high speed.
The 4 valves on the right are the water features, and you can see I have them individually on, but the whole line of them is turned completely off right now and all flow is routing through the returns.
The 4 valves on the right are the water features, and you can see I have them individually on, but the whole line of them is turned completely off right now and all flow is routing through the returns.