No, I used the existing seat from the toilet this was replacing.
Extremely, but it literally lasts one second.
Extremely powerful. That's what I was looking for, and it delivers.
What makes the pressure
This model does include bowl and tank.
I say so because it flushes with so much force it is super hard to plug
Yes, I have 2 and they both do it. I thought it was the Rubber Wax-Free Seal I used (rather than traditional). But I also suspected the toilet was just off a little bit. Someone gave me the tip to slide a little cement under the edge.
If only you could. Don't bother to ask Home Depot for any help. Mine arrived with a broken tank and two different departments told me to basically go pound sand. I had to buy a whole toilet to get the broken part replaced. Then I have to schlep it home from their store and then repack and schelp back the broken parts to get half my money back. Wow. Great customer service.
There is an air bladder in the tank. When you press the handle a jet of air pushes the waste down.