I have several houses (Rental Property).
None of the places have water hammer arrestors.
I have no issues (complaints of issues). My personal home doesn't seem to be giving me problems either.
Two houses are copper, one is galvanized, on is CPVC.
Should I add arrestors? At every fixture? Just at washing machines?
Will not having them cause damage to my pipes?
Should I get them on there ASAP? Wait till it' convenient and am changing something anyway?
I mentioned they are rentals, because that means I'm not living there. There very well could be noise and I just don't know about it.
The noise doesn't bother me, it would be potential pipe damage.
I'm especially worried about the one with PVC-almost no pipe hanger or supports. (Done by a DIY hack for sure) I've been securing them a bit as I work on each area.