First Why the secondary basyps at the bottom? …

Comment on Energy saving heaters by Manjeet.

First Why the secondary basyps at the bottom? Isn’t the solar on Solar off valve at the top a basyps valve? Why wouldn’t you just turn this to solar off and proceed with your winterizing?Second: Assuming the need for the lower basyps valve based on my first question. I think the narrator said leave the basyps valve open as much as you can . Isn’t the idea to run as much water through the solar panel as possible? If you basyps too much then don’t you lose efficiency?Thanks´╗┐