Air in pipes after water tx backwash

[watertreatmentissues]

Last few months, we get terrible noises when we flush, shower, run water right after our water treatment tank backwashes. What would be causing air in the water lines?

 

[steventheplumber]

I'm assuming the lack of an air vent would cause these terrible noises. Does it sound like a hammer is beating your pipes? Your most likely missing a water hammer arrestor in certain parts of your system.

 

[KULTULZ]

I'm assuming the lack of an air vent would cause these terrible noises.

Does it sound like a hammer is beating your pipes? Your most likely missing a water hammer arrestor in certain parts of your system.

I was waiting for a reply to this and missed it...

How would you properly vent a system to bleed out any trapped air? I have seen photos of a vent installed next to a expansion tank at that high point. Is this feasible?

Is the valve shown below correct for his usage?

Valve- Automatic Vent - Series FV-4 WATTS