You put a drain auger down the pipe from the nearest cleanout. You will feel the blockage when you get to it, - then break it through and clear it with the auger.

The cable is 3/4 to 1 inch diameter with a head that expands with the rotation. For a 3 inch drain you use a powered auger that turns the cable.

Try using an auger drill or water jet depending on your ground conditions.

It's a length of flexible steel with an auger-like tip. It can be fed through a drain or cleanout opening and made to follow the bends of the pipe unitl it reaches the clog. It is then rotated until the tip either breaks up the clog or snags it so it can be pulled back out. The size of the snake will be selected to match the size of the pipe.

Auger Rental is not a company. An Auger rental is when you rent an Auger. Here is a website where you can rent or buy an Auger from: http://www.equipmentland.com/categories/diggers/index.shtml?gclid=CM2tt5669akCFYhd5QodekoYVg