February 27

Bit of a stupid question but I'm trying to wrap my head around the HART system before getting any of my parts in and I'm unclear on the air line.

Is there rubber hosing running throughout the length of the line between all the unions/regulator/solenoid? 

I'm assuming not since the hosing isn't threaded lol but what am I missing here? 

Can't wait to stop cleaning my ultrasonic tub...

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