What's the water inlet for the basin and the sink?
Angle valves are normal use of GB 4 points interface, it is recommended to buy a little angle valve (copper, thickening), if the poor angle valve if broken, then the family will have flooded the water.
If the faucet is broken, or replace the hose or something, you do not have to go to the main valve.
You can understand that:Angle valve is a switch on the wire, see you need with a switch, like buying the same socket with switch, will always be a bit more convenient
