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The water should all drain out. I've never seen it not do so.
Very strange. The footwell is filled entirely; not just a little water. The tub drained fine until the water level reached the footwell, then it just stopped. I opened the secondary drain and a small amount of water drained out of it, but the water in the footwell remained.Any idea what the problem could be?
This may sound dumb, but if you have a hose attached to the drain plug, make sure the end is below the level of the tub.
OK, guys, I figured it out. The hose attached to the primary drain had a slight incline in it as it exited the tub. The little bit of water left in the footwell apparently wasn't enough pressure to force the water up the incline in the hose. I went ahead and took the hose off and it drained right out.