The role of Angle of pneumatic valve

Angle of pneumatic valve on four main functions:
(1) the transfer inside and outside the outlet.
2) is the water pressure is too big, can be in the triangle on the pneumatic valve adjustment, turn down,
(3) is a function of the switch, if the faucet leaks are like, may turn off the triangle pneumatic valve, don't have to shut the total pneumatic valve in the home.
(4) is beautiful and easy. So, decorate bridal chamber is necessary commonly, plumbing accessories, when decorate bridal chamber so designer would have mentioned it.