Not sure if this is the way the others fans came but here are 2 out of 3 fans that I received 1 was in perfect shape and worked these 2 well obviously not. I am going to test the pump like you asked shortly and will report back but I wanted to get you guys some pics of the fans.

https://www.dropbox.com/sh/ygekjmd5mi9hyk6/AAAi1Hj4QES0TqBhI4RDqpsoa?dl=0