Taco 570 Series Zone Valve Animation
In this video, Ed Young demonstrates how the Taco 570 Series Zone Valve works, covering both its electrical and mechanical operation.
Primary-Secondary Pumping on a One-Pipe Hot Water Heating System
In this excerpt from his Classic Hydronics seminar, Dan Holohan explains how primary-secondary pumping works in a one-pipe hot water heating system. Dan talks about valves, circulators, flow rate, pressure drop, blending temperatures, and more.
Want to learn more? Read Dan Holohan’s book Classic Hydronics: How to Get the Most From Those Older Hot-Water Heating Systems.
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