45’s are the better option if possible. 90’s will make the open channel a little louder & it also makes it harder for the syphon to purge the air. One or two 90’s can work if they are the only option, but expect the open channel to not be as quiet. U will also want to make sure u don’t have anything else restricting the air from being purged from the pipe or u can have startup issues
Last edited by Lsufan; 02/06/2018 at 08:45 PM.
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