I installed one of our siphon systems in a 2.5 acre pond with 6" pipe with about 30 acres of watershed and it had no problems handling the two hurricanes. It was amazing to see it running full force the first time. It's been installed for about five years now and had no problems with it. I got the parts from my local hardware store. There's nothing fancy about this one, no valves, just a vent for maintenance free automatic operation. It just make quite a bit of noise just as it begins to break the suction.
