Product review (4 stars): Sioux Chief 660-TC0 1/4'' Icemaker Water Hammer Arrestor Tee
Great little product, I was actually blowing out my plastic water filters, the last time the hammering blew out the filter housing which was a $50 part! Overall I recommend this product for protection of your refrigerator's parts and filter.  My only gripe was that it has two male connectors, making a simple pass through connection on the permanent plumbing connections difficult. So you can't just attach it to a Tee, for instance. So what I had to do was go out to the hardware store and get a pack of compression nuts and sleeves, (they don't sell just one).  I had to cut a small piece of tubing and then attach it to the Tee, then attach the tubing to the arrestor.  I then attached the original tubing to the arrestor. So all this could have been avoided with either an adapter or a male connector on one side & a female connector on the other. Oh, I also turned down the main flow into the house to lower the water pressure.