How are fuel oil piping systems typically tested for leaks?

Fuel oil piping systems are typically tested for leaks by conducting a pressure test. This method involves sealing the system and applying pressure, which allows for the detection of leaks. If there is a leak, the pressure will drop, indicating a breach in the piping system. This technique is preferred because it can detect small leaks that may not be visible through other methods.

Visual inspection can be helpful for identifying obvious problems, but it is not reliable for detecting small leaks. Similarly, checking for odors may indicate a problem, but it lacks precision and may not identify leaks in all situations. The use of chemical indicators is not standard practice for leak detection in fuel oil piping systems, making pressure testing the most effective and widely accepted method.