Alligator, I saw a chart a couple of weeks back that showed the difference between a siphon and a plain ol' pipe. I can't find it anywhere now. I thought I saw it on ponddampiping.com but I don't see it there now. You know they say the memory is the second thing to go...

Anyway it seems to me it was about 6 times as much water. I calculated the flow of a 12" siphon (I will have 2 of them) and it was 355,000 gallons per hour each.

I think if you will make a 4" upside down U for your system, you will one day be glad you did. At least have one made that you can pop on there pretty quick.

Hey Moe, I'm trying to think but nuthin's happening!