Does the RT6-4DF include the valve? Also, What is the Flow rate for filling the tub in GPM?A. The Pfister RT6-4DF does not include the valve it is just the trim. The required valve would be the Pfister 0X6-440R which has a 13 GPM flow rate.
Is the 0X8-310A pressure-balance valve necessary or optional for RT6-4DF?A.
The Pfister RT6-4DF does require the rough in valve 0X8-310A.