The gas system is probably the most nerve-wracking of all of the systems, as explosions are generally devistating no matter how you slice it.

In my RV I have a 12.2 Gal mounted propane tank that has basically two uses:

• The tankless hot water heater
• The ventless propane furnace

My propane system starts with a dual regulator right off the tank, which then feeds two 1/2" CSST lines. CSST was chosen for two primary reasons:

• I am comfortable with it, as I re-did my entire house myself using CSST
• It was designed in Japan explictly for the purpose of making earthquake-prone areas safer when dealing with gas

In order to minimize possible damage to the gas lines, a number of precautions are taken.

There are three items in my RV that consume LPG:

• My ventless propane heater
• My Tankless water tank
• (occasionally) a small LPG camping grill that normally uses the small LPG tanks but I installed an adapter into my LPG system.

The CSST lines run under the RV in the least exposed way possible while at the same time keeping in mind that they are properly secured. Steel sleeves are used when there is a risk of external damage from rocks, etc. and care is taken when securing the pipe to make sure frequent vibrations don't result in a breach. This includes either securing a steel sleve that the pipe simply runs through, or protecting the pipe itself with a protective rubber/silicon wrapping at the point it's mounted to the frame.

The CSST lines under the rig run to termination points that come up through the floor of the RV. At no point does the CSST pass through the floor itself where it might be via friction breached. Once inside the RV, the appropriate CSST line is properly secured between the termination point and the appliance it feeds.

Everything has a shut off valve rated for LPG:

• The propane tank itself
• Each of the three lines

The CSST system includes a pressure gauge and can be tested for safety using a standard air pump by shutting off the connection to the propane, connecting the air pump, and ensuring the system can hold safe-worthy pressures (30psi for 10 minutes) at will. In this way I can easily and frequently check to make sure my gas system hasn't failed.

In addition, the standard LPG gas detection alarm is installed within the cabin of the RV itself to ensure any leak doesn't go unnoticed.