Our washing machine hammers really hard and shake pipes through the house. I've installed a few more supports for the pipes in the basement and that has helped, but it still hammers really hard and we want to quiet it down but also be sure that there is no damage being cause to the piping or the machine.
There is a cheap option that might make sense to try first (I'll need two - hot and cold) that is not lead safe: https://www.supplyhouse.com/Sioux-Chief-660-H-Mini-Rester-Water-Hammer-Arrestor-3-4-F-Swivel-Hose-Thread-x-3-4-M-Hose-Thread-Tee
at 4x the cost of the above, the lead free option that I've found is to use these two together: https://www.supplyhouse.com/Watts-0121229-LF150HA-3-4-Lead-Free-Thread-for-1-2-Water-Hammer-Arrestor https://www.supplyhouse.com/Sioux-Chief-652-A-Hydra-Rester-Commercial-Water-Hammer-Arrester-1-2-MIP-Thread
I Don't plan on drinking water out of my washing machine, but my concern is that without a check valve between this and the rest of the piping, is it best to go with lead free so as to prevent contaminated mixing back into the rest of the house?