Quote:
Originally Posted by Delphinus
Ohhhhh oh ho !!! Tricky, very tricky!! It took me a while to see it, but yes now I see it. The outlet has to be higher than the standpipe if you don't want that to happen.
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Then what happens is the tank settles to the level of the closed loop feed, then the water in the overflow drains to the standpipe height.
When power comes on there is no water in the overflow for the closed loop pump and it runs dry....play it safe .... do it right.