look in your bathroom under the sink usually the drain is made of pvc piping in the newer houses here is a picture of what it looks like scroll down it is the white pipe that is being held over the stove top usally home depot or lowes carries it for about 5 bucks or so for 10 feet they also have the connections that we use to put in our tanks
http://nanotank.com/forum/viewtopic.php ... t=pvc+pipe
http://nanotank.com/forum/viewtopic.php ... t=pvc+pipe