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I'm new to sumps so forgive the question.
How far above or below the Weir does one place the emergency drain on a Herbie style overflow? I've seen where some place the drain opening about a 1/2 of so below the weir thereby allowing some amount of water into the sump and other placing it just above the weir so it won't receive any water unless the water rises in the overflow. My thought are to the latter and not the former i.e. but I've seen both advised
How far above or below the Weir does one place the emergency drain on a Herbie style overflow? I've seen where some place the drain opening about a 1/2 of so below the weir thereby allowing some amount of water into the sump and other placing it just above the weir so it won't receive any water unless the water rises in the overflow. My thought are to the latter and not the former i.e. but I've seen both advised