Hi, experts,

I just purchased Watts Premier R.O system. After installed, I saw not much water coming out of faucet and there is steady flow to the black tubing to the sink. I just started the system, I think there is no pressure in the tank.

My question is what is the properly functioning system like? Does water always discharge from the black tubing? What is the function of that red line?

Thanks for your help.

Lost in FL