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Read through the material below, then test your understanding.
Module Lessons
Hot Water
Hot Water Legislation and Standards
System Selection Factors
Open Vented Hot Water Systems
Hot Water Storage Cylinders
Combination and Quick Recovery Cylinders
Unvented Hot Water Systems
Localised Hot Water Systems
Hot Water Safety Controls
Discharge Pipework (D1/D2)
Decommissioning Hot Water Systems
Thermostatic Mixing Valves (TMVs)
Installing Shower Mixing Valves
Replacing Hot Water Components
Expansion of Hot Water Pipework
Testing and Inspecting Hot Water Systems
Hot Water System Fault Finding
Maintenance and Component Replacement
Lesson Overview
All hot water pipework expands when heated and contracts as it cools. Correctly accommodating this movement during installation prevents ticking noises, pipe distortion, and joint failures.
Learning Objectives
Explain the principles and effects of thermal expansion and contraction in hot water systems.
Calculate the linear expansion of copper and plastic pipework across typical temperature ranges.
Identify the installation techniques and components used to accommodate pipe movement.
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