The extender shower arm can be adjust which ordered from Gotonovo
2 Functions:Overhead Rainfall Shower and Handheld Spray
【Material】:Maximum Flow Rate:1.25gpm. 4.75L/min.Using premium brass to make whole shower set.
【Function】:Maximum Flow Rate:1.25gpm.Has 2 functions, overhead rainfall shower and hand held spray.
【Shower Height】:Shower height can be adjustable between 40 inch-46 inch (100 cm- 118cm).
【Shower adapter】:Double cross handle control hot and cold water. Ship with adjustable adapter to adjust installation hole distance between 5 inch - 6.6 inch (13cm-17cm).
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.