How to Look for Leaks on an RV's Propane Tank Fittings

The propane tank in a recreational vehicle provides fuel for cooking. Propane gas contains an additive that gives off a distinctive odor, which serves as the warning sign of a leak. If the smell is detected inside the RV, or if the owner simply wants to check the fittings when reconnecting a fresh tank of propane, a few simple steps can help determine whether the system is properly sealed or if there is a leak.

Things You'll Need

• Liquid dishwashing detergent
• Water
• Spray bottle
• Rags
• Grease pencil or permanent marker

Instructions

1. Add a cup of liquid dish-washing detergent to a spray bottle and fill with water, screw on the nozzle and trigger sprayer, then shake to form suds.

2. Spray the soapy liquid on the propane tank fittings, especially around the tank nozzle, the regulator and the brass connectors on each side of the hose.

3. Check the fittings for bubbles forming in the soap solution, or soapy liquid flowing in odd directions, such as upward, against the flow of gravity. These are signs of a propane leak around the fittings.

4. Shut off the propane tank at the valve and wipe down the fittings with a rag.

5. Mark the leak with a grease pencil or permanent marker to aid in repair or replacement of the defective part.

Tips & Warnings

• Propane is heaver than air and in confined spaces, such as under a cabinet in an RV, tends to collect near the floor. A sniff test low to the ground can determine if there is a leak, and the soap-bubble test can isolate the problem.

• If a leak is detected, repair or replace all faulty equipment connected to the propane tank before using.

References

• "Propane 101: How Do I Check for Propane Leaks?"
• "Propane Wonder Fuel: Leak Checks"