I run straight stack pipes in my overflows. Both are 1 1/4in. pipe.
The Mak 4, while nice flow, made sucking noise in the pipes. Of course one could use some type of Duraso or whatever. I dont like them myself.
I found the flow from a Little Giant 3MD, about 800gph, to be just right. Virtually no noise in the overflows, right amount of current in the sump. However the 3MD is pretty noisy, so finding the Mag pump to match would work.
I also just purchased one of the new Genex pumps. The PCX 30 or I guess a Mak 3. Should do about the same as the 3MD
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Doug
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