THETFORD 565E porta potti not pumping water

We bought a brand new THETFORD 565E porta potti and out of the box it did not pump water when I went to flush it the first time.
I Decided to make a little video for anyone who comes across the same problem. Hopefully this helps some of you who I know will buy a brand-new fitted 565E And I wondering why it won’t pump water on the flush.

Видео THETFORD 565E porta potti not pumping water канала Gavin Coleman