About 4 months ago, I came home to a partially flooded basement close to where our furnace stands. When I investigated, I found that the drain in the floor nearest to where the furnace condensation pipe leads in was completely backed up. After sticking a wire down in there, it finally released most of the backup. My question: is water supposed to remain in this floor drain or should all the water be drained out? I still have a little bit of water sitting in there at all times and didn't know if this was normal. If water is not supposed to be in this drain, how do I clean it out?
Can I also use this same drain for draining my hot water heater as well? Thanks in advance.