the pipe going to the left and right is the discharge point where the other one is the
overflow pipe. during power failure, the overflow stop at that level and will run again
when power resume.
Win wrote:
take the pipe off.
i won't do that...very dangerous against flooding in time of power failure.... the
main reason why in a pre-bored tank, the over flow pipe is at the same level with
the discharge pipe to avoid overflowing. when the power stop, the discharge stop,
thus the over flow stop too. this is why in those tank using sump but do not have
a pre-bored fittings put a hole in the over flow pipe to stop the gravity flow
during power failure.