a volute is the spiral curls on the capital of an ionic
column
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The volute of a centrifugal pump is the tank that holds the
liquid being pumped. The centrifugal pump is a type of pump that
uses a swirling motion to pump liquid.
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Essentially a sump pump encased in a concrete volute to reduce
noise and vibration. These are desirable for high volume,
continuous use applications.