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
Ventalation is one of the most important parts of your roofing system. Has proper intake air flow coming in from the eaves of your home, where your gutters are located, and exausting through the ridg ... read more