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So this is my heater control valve. Can someone tell me how the vacuum port in it works and it’s purpose. Can I bypass this part with a spigot? If So, what would happen?
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BigT500W June 5, 2022
So this is my heater control valve. Can someone tell me how the vacuum port in it works and it’s purpose. Can I bypass this part with a spigot? If So, what would happen?

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