I just installed a new peerless water faucet in a new sink in our bathroom. I have a very low water pressure flowing and cannot get it to increase. I installed it according to directions, What is wrong?

Chances are you disturbed some crud built up on the pipe walls and it got sucked up in your faucet where it's now clogging the inlet ports of the valve. First unscrew the aerator from the spout and turn on the faucet. If you have a full stream then clean the aerator screens and replace. If not then shut the water of and open up the faucet. Check and clean the inlet ports and before you reassemble turn the water back on for a minute to flush out the supplies. Good luck. Tom