Drain drop

How much drop should a drain have going from the trap to where it goes down? This one doesn’t seem to have much if any and the only way to really check is take it apart unless there is a good distance to measure.

Snyder-Deyoung 037 (Small).jpg


The IRC and UPC require the distance to be no less than two times the diameter of the trap arm, which is a relatively short distance.

Thanks Jeff. I don’t think this one had more than a 1/4".