Quote:
Originally Posted by mcgyvr
Thats dependent on the size/length of your plumbing as well as the height/type of overflow box and how the elbows are....depth 9f return outlet. ....and a few other potential variables...
Its not hard to figure out by just examining your system first hand....
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+1.
back flow from siphons and overflow configuration will govern this more than anything else.
i usually just trial and error it. start off low, and raise it till i find a good spot. if you start with your main return off, fill the sump to the desired level, then flip it back on, you should know the max level.