"Why is it called a centrifugal pump?"
A 'centrifugal pump' is designed to make use of centrifugal force to move the water. Centrifugal force is created by a rotating object and it moves things perpendicular to the motion that's creating it. Centrifugal pumps use a rotating impeller to create velocity in the water. The pump converts that velocity into pressure which in turn pushes the water. Since the rotating impeller is creating centrifugal force to pump the water, it's called a centrifugal pump. There are other types of pumps that are 'positive displacement pumps'; they move water by trapping liquid and forcing it through a discharge pipe.

"Also, what's the advantage of having the pump hardwired?"
One of the reasons hardwiring is used is because long cords won't always deliver enough voltage to the motor.

"How would I attach the pump to the electrical wires from my house?"
There are terminals in the pump that you can attach the wires to. Basically, you wrap the wires around the appropriate screws and then tighten the screws. Note: Please refer to the installation instructions that come with the pump.

"It say's this pump is non-automatic. What's the difference between an automatic and non-automatic pump?"
An automatic pump has a built in float switch that will turn on the pump automatically at a fixed water level. After the water is pumped out to certain water level (also a preset level), the pump will turn itself off. A non-automatic pump has to be manually turned on and off, or with a separate control like a piggyback float switch.

"What does it mean by dual voltage?"
The pump is labeled as dual voltage because it has the wires needed to be connected to a 230V or 115V setup. The pump is designed to be hardwired and does not come with a cord that plugs into the wall.

"What's the drain plug for?"
The drain plug allows you to drain the remaining water out of the pump after it's turned off. This feature is designed to prevent water in the pump from freezing during cold weather which could cause the pump housing to crack.

"What does it mean by four position discharge?"
There are four bolts that hold on the discharge. If you want the discharge to face a different direction, all you have to do is undo the bolts, re-orient the discharge, and put the bolts back in.

"Is this pump submersible?"
This pump is not designed to be operated underwater. For fully submersible pumps, click here.