How is waste water disposed ?
The shower tray will not have pooling water.
A special diaphragm pump continously dumps water into your sink.
You can put the pump anywhere outside the shower tray:
on the floor, on the counter. You can turn the pump on and let
it runs during your shower - pump can run dry without damage.
Insert the suction hose into the tab located
at the bottom of the shower tray.
Drain to outside of the window.
Drain to a kitchen sink.
Drain to a bathroom sink.
Best yet, drain to the last drop:
just lift up the tray and push water into the suction hose.