Quote:
Originally Posted by Zalick
Something doesn't add up. If you close the gate valve on the full siphon, your open channel will operate as intended. If you open the gate valve just a tiny amount, it cannot possibly be handling all the water of your return pump, unless your return pump is pushing out a trickle of water.
|
Yea, he got it figured out. What happens in a lot of cases with people having startup issues is the open channel takes most of the water causing the syphon not to be able to purge the air to get going. That is why the airline for the open channel is supposed to be above the emergency. So if anything the emergency takes a little water on startup but it still builds enough pressure to purge the air from the syphon. If the open channel kicks into syphon before the syphon purges it’s air then the syphon will never get going. It is more of a issue with back drilled tanks & interior overflow boxes. On the ghost type overflows it isn’t really a issue because of the hieght differences between the open channel & syphon standpipes.
That was partially his issue but not his main issue. His open channel was taking a bunch of water making it a little harder for the syphon to purge the air. In his case, eventually the syphon would kick in & it would drain the overflow box because the valve was needing to be closed more. The syphon wasn’t kicking in so his small adjustments wasn’t doing anything. Eventually he figured out that his main issue was that his valve needed to be closed way more then what he was doing.