What is a common reason for using an accumulator in a potable water system?

An accumulator is commonly used in a potable water system primarily to prevent water hammer. Water hammer is a phenomenon that occurs when the flow of water is abruptly stopped or changed direction, resulting in a shock wave that can create a loud banging noise in the pipes and potentially cause damage. The accumulator serves as a cushion that absorbs the pressure fluctuations caused by this rapid change in water flow.

By maintaining a stable pressure level and allowing for a bit of water storage, an accumulator can smooth out these sudden changes in pressure, helping to minimize the impact of water hammer on the plumbing system. This is particularly important in systems where there are frequent cycles of water flow, such as when using a pressure pump or in systems with multiple faucets and appliances in operation.

Understanding the role of an accumulator can help maintain both the integrity and longevity of the piping system, as well as provide a quieter and more comfortable water delivery experience for users. Other options, while they may seem plausible at first, do not serve the same primary function of addressing water hammer specifically.