Originally Posted by gregzz4 (Post 682050)

Thanks for the pic and image.
Thought you should edit your post to not mislead others ...


From left to right, based on your valve in the center, you have yours setup as;

• Emergency Standpipe
• Full Siphon Standpipe
• Open Channel Standpipe

You have worded your Emerg and Open reversed.

Originally Posted by braid11 (Post 681846)

Before throttling down, my Hammerhead sees probably max 17' head. That would be 3600 GPH, and even at 20' of head that is 3000 GPH. No wonder it overflowed the first time I tried it. I am at about 900 GPH now, so throttled down to 25-30% of max.

I think I can't get past 900 GPH because the air will not purge fast enough. My drains are about 3-4" under.

I only have about 1.25 inches from the top of the overflow box (about normal water level when all is balanced), until it flows out of the tank onto the floor. So not much time to fill the box, and purge. Maybe that is part of the problem.

Also, I read that when the drains are too deep in the sump, it takes longer to purge.

You are 6" under, and at 80% of full throttle, you must be flowing way more than 1000GPH. I know the system is supposed to be good to 2000GPH, but i can't get close to that.

So you drilled a hole in the elbow inside overflow box. You mean in the 90 elbow? Is it submerged when it's running? Because otherwise would't it suck in air and break the siphon?

Tom

Originally Posted by Gripenfelter (Post 682130)

Yes the elbow is submerged. I'm going to shorten the pipes though.

Originally Posted by Daimyo68 (Post 682107)

Thanks, I guess seeing it from the front all them time I unconsciously just labeled them while I typed it out.

Originally Posted by fishytime (Post 681935)

how?.....you stop the emergency just short of your water line in the sump so you can hear if the primary is clogged or needs adjusting....straight open run means no purging:wink:......