Equipment Manual Suction Machine?

Hi

Just wondering if anyone has experience of using a manual suction?
My son has severe bulbar palsy and is totally reliant on a suction machine. Our machine recently stopped working and this got me thinking maybe I should have a manual suction as a backup but I don't know where to start so any advice appreciated  

Suction machine was just launch its manual process due to the longest error of online this was much difficult to use. I need to get manual of this that I found from superior paper this have all the guide books of all the manual software on it that was good.