The sungrabber vacuum relief valve helps to facilitate the drainage of the panels in the system. This is especially important when winterizing your panels to prevent any freeze damage from occuring. The sungrabber vacuum relief valve is highly recommended by the manufacturer for all sungrabber solar panel heating systems.Original FAFCO part made specifically for Sungrabber Solar Heating Panels
Recommended for all Sungrabber Roof Mounted Solar Heating Panel Systems
Makes winterizing your panels a snap!
Made of sturdy PVC
Easy to install