mixer grinder pump Answered

Our water tank is on the roof, so the tap there doesn't have much pressure to water mom's plants on our roof with a pipe. So i need to make a pump. We have an old mixer grinder set with all its jars. But i'm not sure how to make a pump into a jar.
limitations:
1) Can't cut holes in the metal parts of the jars, no equiments. only the top is plastic
2) 3D printer/ cnc or any thing of that sort is not available