does not have a low water drain, so I want to put one in. The more I progress with my idea, the more I believe this will only drain the freshwater tank.
I have a "t" going between the tank and the pump intake (had to order a new pump, "old" one bit the dust), then a line down and through two layer of egg:
It comes out where you can see the masking tape. The hole to the left is a weep hole put there when the trailer was built:
This is what I think I'm going to use for a valve. It's closed in this pic, so it will be in line with the bottom of the egg.
Now I wonder if I need to put in another drain for the rest of the system?