Checking the Clean Out   Main Drain Backs Up   Kitchen Drain Backs Up   Laundry Backs Up   Toilet Backs Up   Tub Drain Backs Up   Shower Drain Backs Up   Slow Lavatory   sewer line repairing   Kitchen line repairing   Tub drain repairing   P trap installation   Installation of a cleanout   Water heater cleaning   No hot water   Combustion air requirement   T&P valve   Water heater installation   Tankless water heater   Air gap for dishwasher   Dishwasher backs up   Sticky garbage in disposal   Solving the jam problem of   disposal	Welcome to plumbing world !! You can click one of the following options for more information...			Galvanized steel pipe   Copper pipe   Polypropylene pipe   Low pressure faucet   Emergency valve   Gate valve   Gas weight comparison   Leaking under the ground   Installation under the ground   Installation under the   concrete   Pipe size   Leaking at the bottom   Leaking from the tank   Water flowing continuously   Clogging often   Water dripping   Sudden leaking at the   kitchen   Don't tighten the shower   faucet too much
	■ Gas weight comparison ■ Installation under the ground ■ Pipe size ■ Leaking under the ground ■ Installation under the concrete   ■ 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.