Product review (5 stars): Very easy to use
Very easy to use...if anyone who manufactures this is listening.  Don't put the water values in the middle slots.  If I wanted this turned upside down to use the middle hole as the drain, I would have two empty voids in the top to contend with, since you don't provide plugs.

Anyone doing this install has to be handy...messing about with pex connections and drain lines is not for muppets.