Quote:
Originally posted by burgermeister:
The flow potential of a syphon is determined by diff. in ht. of pond side pipe inlet and how low the pipe outlet is below this behind the dam. it can be several times the flow rate than gravity drain alone. It can suck out the 'bad' water and muck if placed near bottom.
It's amazing how much water a 4" pipe can siphon with only a 2 or 3 foot head. I think it could drain off a 10" rain from my 1.5a pond in 2 days or less. Right now I have to hand start the siphon with a hand bilge pump, but will add a vent with a flapper when and if I ever complete my pond.

Shrimp