what shower valve do i nee to purchase along with this? I am planning to use this in new construction.

There is probably one that is made to go with this sprayer assembly. I would just be sure it matches the finish. Some people like the old fashioned valves that have the hot and cold handles separate. But DON'T GET the CHEAP single handle ones that turn on the volume AND adjust the temp to hot or cold too. Get a valve that has the temp adjustment and volume using two different handles or knobs. That way when you get in you already have the temp set with one adjustment that stays in the same place. Then you have a handle or knob to adjust the volume of water you want. . That way you can reduce the volume without changing the temperature. Just my opinion

Thank you for your question, Brad. You can use this hand shower with any R10000 rough-in valve and 14, 17, or 17T series trim kit. There are a couple options to divert the water between showering components. The first is an in-wall diverter. For this, you will need the R11000 Rough-In Valve and a T11_ Diverter Trim Kit to match your shower valve trim. You will also need a supply elbow for the hand shower hose, such as the 50560-RB. The second option is to use a shower arm diverter, such as the U4923-PK or U4929-PK. Best regards, Jon