ARB RD197 - Manual (Page 32)

4 Installing the Air System
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 Screw on the outer compression nut and tighten, while supporting
the center compression nut with a 3/8” spanner. The airline is now
attached to the center compression nut.
NOTE : The outer compression nut will tighten against a stop.
Over tightening will not create a better seal.
 Assemble the support spring over the outside of the outer
compression nut.
 Secure any loose sections of tube with a cable tie.