Quote:
Originally Posted by JP91
As long as your overflow stop at the lower entry mark, your underflow will also stop. Unless is your sump last compartment the water level is quite high already, by then your tank water go into your sump then will overflow
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OK! I didn't know that when the overflow stops, the underflow also stops. Now I know. Thank you! Now I no need worry so much!
But why underflow also stop? I don't quite understand
