I have to move move the kitchen sink copper supply lines slightly as part of a kitchen renovation on a rental house. There are water hammer arrestors (site-built ones, not the diaphragm type) on both the hot and cold, and I’m wondering if they are really necessary. I don’t have them in my house, and it would simplify my installation and unclutter the space under the sink if I omit them here. Any advice is appreciated.
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The T-stub type arrestors are pretty much worthless -- they are quickly waterlogged. If hammer becomes a problem (which is unlikely) it would make more sense to install diaphragm type arrestors (which can be installed in any orientation).