Why I'm ditching my herbie style overflow

[asylumdown]

Originally Posted by fishytime

the way Im reading it, the problem isnt with the plumbing inside the overflow box, it is the fact that the two drains are plumbed into one on the bottom side of things.....that is a major herbie no-no....two drains into one is creating back pressure which is why its causing noise and stability issues.........and just to correct what Denny said....there is no syphon with a herbie....it is purely gravity that feeds it(like a bathtub or toilet)....

Hehe, yes that's precisely what I'm saying. If your plumbing ties two overflow lines in to a single pipe that feeds your sump, a herbie is not the best choice. The levels in your overflow boxes become infinitely more difficult to control. I never found that written anywhere when I was doing research (I might have just missed it), and I have had nothing but headaches with these overflows. I need my overflow plumbing to all be tied in to one pipe for my sump to work the way I designed it, so my solution will be to ditch the herbie.

Had I come across this thread 6 months ago, I would have saved myself a whole boat load of trouble.