Page 286 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

The City & Guilds Textbook: Plumbing Book 1

A typical pump package would normally consist of the following components:

● the pump
● a transducer to sense pressure and flow
● a control box to monitor pressure differentials and flow rate
● an accumulator to assist in providing sufficient system pressure for the
installation
● a float switch to prevent the pumps running dry.

Electrical connection
and isolation panel
Accumulator
Pressure transducer
Multi-stage centrifugal
pump motor
Pressure gauge
Control panel
Supply manifold

Water intake manifold

p Figure 5.37 Components of a vertical multi-stage pump set

The accumulator

The accumulator is a pressurised vessel that holds a small amount of water for
distribution within the installation. It is designed to maintain mains operating
pressure when the pump is not working, and to reduce pump usage. Small
accumulators can also be used to suppress water hammer.
Small domestic installations use bladder-type accumulators. These consist of a
synthetic rubber bladder or bag within a coated steel cylinder or vessel.

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