I have a drain made of PVC pipe on my back porch. The PVC pipe sticks up from the concrete about an inch or so. What is the best way to cut the pipe down so that it will be level with the concrete? What tools do I need?
One of those oscillating tools would be perfect for this.
But before cutting it you might want to figure out what it's for, and if you'll need it in the future. Cutting the pipe should be fairly easy; but if you ever have to, making it longer is more difficult.
Take a 12" hacksaw blade out of the hacksaw itself, press it flat against the floor and start sawing.
The blade should be flexible enough for this and will cut as close to the floor as possible.
You will want to hold the end of the saw blade with a cloth or gloves to avoid cutting your hand.
As tester101 suggests, the best power tool way is probably an oscillating tool.
For a cheaper (hand tool) solution, a jamb saw is primarily designed for cutting the bottom of door jambs to install flooring, but in general is for cutting flat against a surface.
If you cut it flush, it will be very difficult to extend later, if the need ever arises. An alternative is to protect against tripping by putting a table or an orange cone ($15 from Amazon) over it.