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
Begin by going to www.NARI.org and find a chapter of the National Association of the Remodeling Industry in your area. NARI members are held to a high standard and they commit to a Standard of Ethics ... read more