HomeGas Line
  ■ Gas Weight Comparison
Air Natural gas Propane gas Butan gas
1 0.6~0.62 1.53 2.0
As you see in the table, natural gas is lighter than air. So you need to open the window to work for natural gas but propane and Butan gases are much heavier than air. You need very keen attention to work for these two gases. You need to remove all the remained propane or butan gas before starting the work.
 

  ■ Leaking Under The Ground

Gas line under the ground should be air tightened but this picture is showing no air tighten. So corroded and leaking.

  ■ Installation Under The Ground

Gas line under the ground should be air tightened so that no moisture would be allowed to prevent the rusting.

  ■ Installation Under The Concrete

Since this california area is earthquake possible zone, gas pipe should be protected from the earthquake. So it need 2 pipe size condo for the gas line under the concrete.

  ■ Pipe Size
Gas line pipe size is extremely important. When you wash the hand with less water pressure at the bathroom sink, you will be able to wash the hand even though you feel inconvenient. But if the gas appliance gets less gas during the working, fire will be off and the gas will come out continuously. It will be the cause of explosion and fire. Furthermore, you can not get insurance assistance because of irregal. That's why gas pipe size is very important. Gas pipe size is decided by total BTU + distance from the meter. When you try to add a gas appliance in your home, please don't think easily by extending from the current pipe. Please never forget to calculate total BTU & distance from the meter.