[rheavn]

Two gauges that register 0 to around 150 psi.  A 1/4" collar with a shut off valve.  Two 1/4" and/or 3/8" air line connector.  2' of either 1/4" and/or 3/8" air line. and two nipples to attach the gauges to the shut off valve.  The reason for 1/4" and/or 3/8" is because your coach probably has both like mine.  Build all the tools as you will need them all.  All are simple and inexpensive.  I got all the parts from Amazon.

Pictures are worth a 1,000 words.............................................................

http://newellgurus.com/showthread.php?tid=2705

When you start using your leak down tool, my acceptable standard is the line, fitting or component should lose no more than 1 pound in an hour.


Good luck...............................