Hello Elle and thank you for the feedback you posted on the Home Depot website. The Moen Brantford Single-Handle Posi-Temp Shower Only Trim Kit in Oil Rubbed Bronze (Valve Not Included) is a shower only trim kit designed for installation onto a Moen Posi-Temp tub/shower rough-in valve. Moen’s Posi-Temp tub/shower rough-in valve is a single handle, pressure balancing/anti-scald mixing valve designed to operate a handle that only rotates to turn on/off the water and adjust temperature. The Brantford Single-Handle Posi-Temp Shower Only Trim Kit in Oil Rubbed Bronze (Valve Not Included) was not designed for use with another manufacturer’s rough-in valve. Our product specialists are available for pre-purchase, installation and warranty assistance. They can be reached at 1-800-289-6636 and are available Monday through Friday from 8:00 am – 7:00 pm Eastern Time.