I want to buy storage water heater tank for my house but I am confused. I hv 3toilet. 1 is my master room . 2nd is ground floor room directly below my master room toilet. 3 is upper floor sharing .

Problem is master room toilet ceiling has plug point, extra blue pipe, 2 steel pipe outlet, sharing toilet has plug point, 1 extra blue pipe and steel pipe...unfortunately the room at ground floor dont hv any pipe at all on top of the ceiling beside a plug point. Funny part is the below the basin i can see an extra outlet pipe.

Now i m headache. 2 toilet have the necessary pipe for heater tank. But 1 dont hv any

But that bathroom hv mixer with shower spray and outlet for mixer on basin. Is just that I cant find any piping on top of the ceiling to fix tank.