Just installed Whirlpool UltraEase PLUS In-Line System. Water pressure through it is so low that water dispenser produces a trickle; ice-maker is working fine although I think it fills slowly. A fitting on this unit has a "flow control" which I think is just a plug with a very small hole in it. My question is why the low pressure (I checked for crimped lines and all ok)? and could it be that flow control device inserted in the fitting; can I just remove it?