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Typical Home Propane System

Cylinder Diagram

Propane is delivered to your home as a very cold liquid and is pumped into a specially designed storage tank (A). The liquid changes to gas before it leaves the tank. Propane tanks are typically painted white or silver to reflect heat and prevent the pressure inside the tank from getting too high.

If you have an underground tank, only the cover (B) will be visible above ground.

Cylinder Diagram

The cover on top of the tank protects several components from weather and physical damage, including:

  • The tank shut-off valve (C), which you can close to stop the flow of propane to your home in case of a leak or other emergency.
  • The regulator (D), which controls the pressure of the propane gas coming out of the tank
  • The safety relief valve (E), which will pop open automatically if the pressure inside the tank gets too high. The valve will close again when the pressure returns to normal.
  • The tank gauge (F), which shows the percentage of propane in the tank.

Propane flows from your tank to your home through pipes (G), most of which run underground.

You may also have a secondary pressure regulator (H) on an outside wall of your home to further adjust gas pressure.

A shut-off valve (I) in each pipe can be closed to stop gas flow to an individual appliance.

An appliance connector (J) is the final segment in the gas piping system. This specially designed flexible tube-typically two or three feet long-carries gas from a pipe to the back of an appliance (K).


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