In the market for an HOB overlfow.. Flooding discussion

[Jakegr]

The main thing with HOB overflows is to ensure the flow rate through the u-tube is high enough to prevent a siphon break.

It is still always smart to simulate siphon breaks to ensure the tank won't flood. My fail safe was making the pump chamber of my sump small so that the display tank would not overflow if the siphon breaks.

Keep the flow rate high, and have a fail safe. If you do that, HOB overflows are just as good as a drilled overflow, IMO.

Originally Posted by clown lover

Have look at this product , 24 years in business no failures.http://www.lifereef.com/siphon.html

That is a BS advertising claim.

Lifereef makes a good product, I own one, but they are by no means fool proof. They are essentially the same design as the Eshopps PF series overflows, but are made of thicker acrylic.

They are also really pricey, especially for Canadians ($50+ shipping).