Running the open channel into a different area (read different water level) is not advised, it can mess with the dynamics of the system. All the lines should run into the same section of the sump. The Dry emergency is an exception, and generally I run it into the return section. All equal configuration, and identical, thusly:
There is not enough flow through the open channel, to serve a "fuge" and if there is, then the flow through the open channel is too high.
Also, the type of valve has no effect on horizontal runs. Horizontal runs can and do cause starting issues (trapping air.) Hence, horizontal runs are not recommended for use with siphon systems, irregardless of the type of valve used. Gate valves only accomplish more precise control, they do nothing else.
Setup the system as designed, and do not get carried away with ifs, maybes, and inaccurate information. This system works as designed. That is the only 'warranty' there is.
My question was actually about the least amount of flow that the bean animal drain could handle and still operate. The thread is way over 200 pages and was looking for a quick answer so I could order a pump. Theirs no way I would run a 2000 GPh pump through my sump. Also no need in running a 300 watt pump if I ended up having to dial it back for the bean animal to handle it. Running a pump that is way too large and only using half of it always seemed kind of silly to me. I was just looking for suggestions from people with the same size tank and different pump options on the lowest flow end.The short answer is no, and I would not recommend a larger mag drive pump either. You want a pump in the 2000gph range.... The long answer should be in a thread of its own....this thread is about the drain system, and really should not get too far astray.
This is the question you asked:
You are looking for a bottom end pump solution, based on cost, rather than what is actually good for your system. But a 9.5 is not the pump for a 200 gallon + tank. Sorry.
To answer your second question about the "flow capability" of a bean system, with 1" bulkheads, and 1.5" pipe it has a very wide "bandwidth" maxing out at ~1500 gph with a 24" drop, better at 36" which is more "average." Going above that, You need larger bulkheads: 1.5".
As for the rest, your information is way outdated, mentioning a 300watt pump is needed to do the job an 85watt pump will do, seems like "loading the deck" for some reason, unmentioned.
http://www.rlss.ca/#!dc-pump/vstc3=dc10000ii
Coming out of a basement, if that be the case, you will need a pump with "guts" which the mag drive pumps don't have either.
But like I said, pump questions should be posted elsewhere....
Third time...... sorry if it double posts.... I am having problems with a 70g tank and a eheim 1250 pump. The full siphon won't purge after a pump cycle. Here are some pictures
