Is it possible that your airline that is responsible for breaking the syphon is at or below your water tank in the bottom of the 2nd pipe? If so and you get enough flow from your circulation pump, it will NEVER stop...
Try shortening the tube and see if that helps...1/2" may make a big difference.
eskowronski, take a look at the youtube video listed in this thread, it doesn't require an air tube and it doesn't follow allman's design. i have used the design shown in this two part video. they work flawlessly without playing with an air tube.
eskowronski, take a look at the youtube video listed in this thread, it doesn't require an air tube and it doesn't follow allman's design. i have used the design shown in this two part video. they work flawlessly without playing with an air tube.
made another bell siphon today, no adjustment works perfectly. this was a 3/4" standpipe with a two inch bell. also the two to one ratio bell to standpipe that is suggested so often doesn't seem to matter. 3 of the ones i have built are 3 to 1, the latest is 2" to 3/4" bell to standpipe.
these are the first bell siphons with the four large round opposing holes that i have made, the siphons break consistently.
made another bell siphon today, no adjustment works perfectly. this was a 3/4" standpipe with a two inch bell. also the two to one ratio bell to standpipe that is suggested so often doesn't seem to matter. 3 of the ones i have built are 3 to 1, the latest is 2" to 3/4" bell to standpipe.
these are the first bell siphons with the four large round opposing holes that i have made, the siphons break consistently.