Hey Bin,
If you havent done this before, then follow this, shutdown the Valve first then open the faucet from both sides upwards and downwards. If you still need more information you can possibly get ... read more
Yeah it depends on what faucet you be using and check if your faucet has an aereator. for more information about home improvements visit, Best Drain Cleaning, Sewer Repair and Plumbing Services