What is the purpose of a dishwasher water hammer arrestor and how does it prevent water hammer in a dishwasher system?

A dishwasher water hammer arrestor is used to prevent water hammer in a dishwasher system. Water hammer is a sudden increase in water pressure that can occur when water flow is suddenly stopped. The purpose of the water hammer arrestor is to absorb the shock caused by the sudden stoppage of water flow, preventing damage to the dishwasher and Plumbing system. It does this by providing a cushion of air or gas that absorbs the pressure surge, reducing the impact and preventing the loud banging noise associated with water hammer.