Angle valve has four main functions: ① transfer the internal and external outlets; ② the water pressure is too large, you can adjust it on triangle valve, and turn it down a little; ③ the function of the switch. If the faucet leaks and other phenomena occur, you can turn off triangle valve without closing the main valve at home; ④ beautiful and elegant. Therefore, generally a new house decoration is an essential plumbing accessories, so designers will also mention it when decorating new houses.