DON_010_4897

9. Since this large diameter fitting will now reside in a tray full of polymer air lines, it is important to cover it so that the brass union will not rub against the other air lines and cause additional leaks.
11. Air line repair unions are available in many different sizes and types, including some that do not require any tools. Here is an example of a “push to connect” fitting, made to withstand the high pressure of a typical air line which can reach 150 psi. If you don’t already have any of these in your tool kit, it may be a good idea to obtain a selection (make sure they are DOT rated) of sizes and keep them available. Quarter-inch, 3/8-inch and ½-inch are all very common on motorhomes, and one of each should be in your toolbox for quick repairs on the road.

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