I rerouted the water pipes (cold & hot) and drain vent line in bathroom sinks to make room for inset medicine cabinets. After tuning water back on, the water hasn't flown at the sink location but it does flow at all other locations. It weird though because the hot water flowed weakly at first from one sink (the cold water line never did. They spit and sputtered some but now no water flows at all at the sink but it does everywhere else. Any suggestions as to what happened? Can there be an airlock?

jrwright, I would suspect you've knocked debris loose and plugged up your faucets or shut-off valves.

Try taking them apart and flushing out. Good luck