Unit 315 Session 3a Assignment 1

​Unit 315 Assignment part 1:
Cold Water Systems Planning and Design

​Objective:

To understand the planning, design, and problem-solving aspects of cold water systems in multi-storey buildings.

​Instructions:

1. Read the provided document (Link below) on cold water systems, focusing on the layout features, boosting systems, and storage cisterns.

2. Answer the following questions using the information from the document.

Cold water part 1 assignment.pdf

Section ​1: Multi-Storey Building Requirements:

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Define a multi-storey building in the context of cold water systems.

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Explain why multi-storey buildings require special cold water system designs.

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In some parts of the UK, it is not unusual to find premises with pressures lower than two bars and flow rates of below?

Section 2: Boosting Systems:

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If the public supply is inadequate or the building too high, then the water supply within the building must be boosted.

There are several ways that this can be achieved and these can be divided into:

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Why are indirect boosting systems more commonly used than direct boosting systems?

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Explain a direct boosting system.

Section 3: Indirect Boosting Systems:

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What is the role of a break cistern in an indirect boosting system?

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Why does the capacity of the break cistern needs careful

consideration?

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Why are indirect systems the most common?

Section 4: Storage Cisterns:

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What materials are commonly used for large-scale storage cisterns?

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Explain the importance of backflow prevention devices in large-scale cisterns.

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Describe the installation requirements for large-scale cisterns according to the Water Supply (Water Fittings) Regulations 1999.

​Problem-Solving Scenario:

Design for a 12-Storey Building:

• Boosting System: Use an indirect boosting system with a break cistern and booster set.

• Storage Cistern: Install a storage cistern at high level to ensure adequate water supply to all floors.

• Diagrams and Justification:

  • Break Cistern and Booster Set: The break cistern stores water before it is pumped to the storage cistern.

  • Storage Cistern: Ensures a consistent supply of water to all floors.

  • Float Switches: Control the pumps to maintain water levels.

  • Backflow Prevention: Install backflow prevention devices to prevent contamination.