Your vent hole is not large enouggh, Steve. The water level should only go down to the level of the pipe that your vent hole is in, Should never uncover the inlet like that. If the inlet sucks air, you will loose the siphon like how you are. keep increasing the vent hole bit by bit untill you find the diameter that works well.
It's hard to tell, but do you even have a vent just before the last 90 and the down pipe.
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Dan Pesonen
Umm, a tank or 5
Last edited by banditpowdercoat; 03-08-2010 at 08:36 PM.
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