How is a leak tested after installing a propane connection?

• A. Test with a metal rod.
• B. Apply a soapy water solution to joints and connections; look for bubbles indicating leaks and re-test after repair.
• C. Use a gas detector only.
• D. Start the system and observe if flame appears.

Answer: (B)

Leaks are checked with a soapy water solution applied to all joints and connections, watching for bubbles that indicate escaping gas. If bubbles appear, tighten or repair the fitting and then re-test to confirm the leak is fixed. This method is safe, quick, and clearly shows where gas is escaping without creating an ignition source. Using a metal rod could spark or damage parts, and starting the system to see if a flame appears is dangerous and not an acceptable test. A gas detector alone may miss small leaks, so the soap solution test is the standard method, with a re-test after any repair.