Material:Maximum Flow Rate:1.42gpm. 5.36L/min.Brushed Nickel,resists tarnish and corrosion from daily use Function:3 Functions,Overhead Rainfall Shower, Handheld Spray and Tub Spout.Diverter switches between top shower,tub faucet and hand spray,Either one works or the other Size:8 inch shower head,shower height is Adjustable from 70cm-120cm((27.5"-47") Installation:Wall mounted 2 holes installation,hole center distance: 150mm, Ship with adjustable adapter to adjust installation hole distance between 5 inch - 6.6 inch (13cm-17cm).Comes with all mounting hardware. Cartridge inside it makes it pressure balance since will not work if doesn’t have hot and cold water going.That’s means pressure balanced.It doesn’t need a pressure valve installed.A pressure reducing valve is installed on the main water line coming into house.it reduces pressure from the city water main down to working pressure on the whole house not on an individual faucet.Due to code requirements .Would recommend to seek advice from local plumber before purchase to verify suitable size.