Originally Posted by 3 Happy Campers
On mine there were just cap nuts or whatever the technical plumbing term for them is.
I added the ball valves.
You will see two right next to each other. Those will be the low point hot & cold lines. They have cap nuts on them.
Somewhere else under the unit you will find one single line with a cap nut. That's the fresh water tank drain. Right next to that will be a line with no cap on it. That one is the fresh tank overflow.
Yes sir, that is excatly how my last trailer was.
This new rig has no such caps for two drain pipes under mine.
Actually one of the drain pipes with no cap is right next to the drain pipe with a valve that drains the holding tank.