Water Hammer Arrestor on shower mixing valve

[JimV]

I am doing the plumbing on an addition that we are having done. I am installing (what I call) Water Hammer Arrestors (12" of air-filled pipe) at each supply stub out. I am also installing a mixer valve in a dog shower. The instructions for the valve don't mention adding anything to limit hammering. The pictures just show the supply pipes going directly into the valve. Should I tee in an air filled pipe before the valve? Thanks.

[HayZee518]

wouldn't hurt - easier to do it now than when wall finish is up.