Terminology

You will need to understand your:

• water system
• associated equipment, and
• be familiar with its constituent parts, such as:

• 
  Dead/blind end – a redundant length of pipe, closed at one end, through which water cannot flow.
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• 
  Dead leg – a pipe leading to an outlet through which water flows but the outlet is unused/rarely used.
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• Sentinel outlets – the nearest and furthest/last outlets from hot and cold water cylinders and tanks.
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• Thermostatic Mixer Valves (TMVs) – these blend hot and cold water to reduce the temperature where a scald risk is present.
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