My bathroom is within the 20 foot drain, no extensions needed. I have a 20 foot patient line also. My machine is in my living room, with that I can go into the bathroom, my computer room, bedroom and kitchen. I drain into the toilet,; I was draining into the bath tub, but after 6 - 8 weeks it seemed the tub drain was running slower. I filled the tub with HOT water and it corrected the slow drain. I now drain into the toilet. I put the clamp on the bowl behind the back spacer button of the seat and position the drain line to point down and then put the line over the tissue holder. That seems to keep the line from turning. With the clamp where it is, it does not squish the line when I am sitting. I work the drain line a tad to make sure the line moved freely.
I use a drain bag. My nurse says it's important to use a drain bag because you can see if your fluid is cloudy. Drain bags can cause a mess, though if the clamp becomes loose or you forget to clamp it or connect it to the cassette.