Ok, according to the Delta site, (and common sense) - it's specifically intended to allow more water flow to the tub. So - how much is too much flow? If the valve has seperate temp/flow... can I just turn the flow down when I don't want the pressure?
Sorry if this seems silly, but all of the other showers in the house seem to have really low pressure... and I've checked for flow restrictors in the heads, but none have them. I'm assuming that I just have low pressure here.