[rheavn]

Back in 2016 I spent the winter working on my air system.  The first thing I did was replace all of the push in fittings with D.O.T. compression type air fittings.  My next process was to begin looking for air leaks.  I started by making a schematic of where the air line went so I could isolate the different components in the house air system.  These schematics have proven to be very helpful reference material in keeping my air system as leak free as possible.  As I tested each air line on the house side of the coach using a leak down tester, I  didn't consider the air line leak free until I got it to losing less than one pound of air loss in an hour.  This process took a considerable amount of time, but only a few dollars for the compression fittings.  Final result was the 110V air compressor running twice in 24 hours.  By far the most useful tool I used was the leak down tester.

Results after 6 years.   My 110V compressor still only runs twice a day if no usage.  In the last six years I have had 2 air leaks.  The first was the HWH compressor unloading valve.  The second was the bedroom slide seal developed a very small leak.  Using my schematics I was able to identify both air leaks in under ten minutes without getting under the coach.  I have not found a single air leak coming from any of the compression fittings that replaced the push in fittings.

Hopefully this will encourage the DIYers to eliminate your air leaks.