Hi all. Been a long pool-less winter! We have what seems to be a 2 way valve on the pipe that runs from our filter to the heater lines and then back to the pool. As in the attached pics, the off/closed tab only points to the right (towards the heater) and down (towards the return line to the pool). I'm not sure why the builder installed this as I don't know why I'd not want to send water to my heater, but my question is this (as I always ask myself this each year); which is the proper run position? I would think its with the off/closed tab pointed to the right so that it is not pointing towards a pipe (and stopping flow), as if it's pointed in the other position downward it would stop water from flowing from the heater back to the pool, yes? Thanks for the help on a remedial question!