Hello Ster and thank you for your interest in Moen products. The MOEN Waterhill PosiTemp Showering Trim in Chrome (Valve not included) uses the Moen PosiTemp rough-in valve. The Moen PosiTemp rough-in valve offers several installation options; you can choose a valve with built-in shut off /stops, a valve with threaded connections or one with solder connections. The following are links to allow you to view these options and their pricing:
Model #2590-threaded connections with built-in shut offs:
Model #2570-solder connections with built-in shut offs:
Model #2510-threaded connections:
Model #2520-solder connections:
If you have additional questions, please complete the form at http://www.moen.com/consumer-support/contact-us or call Moen at 1-800-289-6636. Our business hours are 8:00 am – 7:00 pm Monday through Friday and 9:00 am – 3:00 pm on Saturday EST. We are here to provide support and ensure you will be satisfied with your Moen product.