Water enters the trap once it rises above a given level. A means is provided for maintaining the level of liquid inside the trap at this level over an extended period of time, preferably during normal use of the drain.JERED NIJHOF
When it comes time to apply the weather stripping, I begin nailing at the top with a single copper nail, but I only sink it half way. It's extremely important to make sure the vertical and horizontal location is correct with the first nail, but I can still make slight rotation adjustmen...