Make sure it is a cheap one thou, had a custard years back whom installed a very pricey grohe. Forgot to isolate and drain in a very harsh frost. The valve split the brass at the back. Changed it out for a tmv, lever on a fixed rail, handset and tee off for a hose, nice little set-up. Him and his wife liked to go surfing and living next to the beach was ideal for them. His missus was tasty as well, asked her to test drive shower for me..........she politely declined bless her.