Furnace running requires hookup or engine running?

wopachop wrote:
I rented a trailer twice. Same guy. He told me i had to bring back the trailer with both drain valves open. Which means spilling feces onto the street.

I hope you waited until you got to his property to open the valves. :E

I wonder if he intended you to leave the cap on? That would have saved the street, but the next guy would have been sorry when he opened the cap.