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e. I don't want to install water arrestor all over the place

But it's not called a water arrestor, I don't think. What is it
called?

It is an accumulator. It might have different commercial names, but
technically it's an accumulator. If you put one at each faucet that causes
pipe banging, the pipe banging will go away. Not sure if it's worth the
money, it might be easier to identify the pipe that is actually banging
and put the accumulator between that and the faucets if possible. An
accumulator performs a similar function to filter capacitors in a power
supply in that it maintains a more constant pressure when there are
transient spikes in load. It prevents the current surge that causes pipe
banging.


I might mention that in industrial/commercial applications, you will find
pipes with springs at the bends to absorve the movement caused by sudden
changes in water flow. You don't usually find that in residential
applications. However, I think better builders will be carefull to secure
the pipes at bends to prevent pipe banging. Doesn't mean the pipes won't
come loose in time.