This wall mounted rain shower faucet with pressure balanced valve is easy to repair. It is equipped with check valves that can prevent water pipe noise. It is also easy to adjust hot and cold water flow rate. The pressure balance valve chamber monitors water pressure balance to protect you from scald due to sudden changes of pressure of hot or cold water The 9.8-in raining sprinkler mixes water with air, and simulates the natural raining to provide you with natural contact of water experience The multilayered electroplating passed the salt spray test, it can easily face the surface corrosion by humid environment in the shower room CASAINC Polished Chrome 3-Spray Wall Mounted Rain Shower Faucet with Pressure Balanced Valve