Hi, someone pls help me out. i have recently constructed a toilet on the roof of my building, but this one is higher than the water tank level, many people suggested to use a booster pump or a water pump witha pressure tank. i am not sure how this will work. how when i open the tap in the toilet the pump will start automatically. can some one pls suggest to me any web page where i can find an isometric view of this arrangement or atleast a line diagram? thanks