I have several sections of 4 inch corrugated drain pipe that are pieced
together with several snap-on T connectors. All of this is
above-ground, and the problem is that they are leaking a noticeable
amount in certain places from where the pipe meets the T, and it is
causing puddling in an area tha getts muddy easily.

I only really need to fix the leaking in one area.

I was thinking about going around the outside of the joint a few times
with some really wide teflon tape, and then secure that with some duct
tape, but that was just my first thought.

Got any better ideas?

The stuff I'm talking about:
http://www.homedepot.com/webapp/wcs/...egoryID=528152

http://www.homedepot.com/webapp/wcs/...9 0009+528106