My super installed the faucet. I don’t understand why the water flow is very sloe/thin, almost minimal.  He tried so many ways, sometimes a little bit stronger, then in a few hours the water flow becomes a treacle.  What did he do wrong?  He tested the line before it is hooked up to the faucet, the flow is very strong just like the shower & bath faucet.  He has discarded any installation instruction if there was any. I need your help.  I really like the looks of the faucet.