When the end of the 6mm hose is inserted into the valve block or airbags, it seats through 2 o-rings in each collet. You can usually feel 2 distinct movements as you push it through. It's essential that the end of the hose is cut cleanly at 90 degrees. Using a pencil sharpener, cut a very small chamfer on the end of the hose prior to inserting in the collet. This greatly reduces the possibility of distorting the o-rings.
While most of the air hose is o/d 6mm, one or two others are 8mm O/D. Can't quite remember which these are. A quick check with a vernier will sort it out.
MY99 RR P38 HSE 4.6 (Thor) gone (to Tasmania)
2020 Subaru Impreza S ('SWMBO's Express' )
2023 Ineos Grenadier Trialmaster (diesel)
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