HOT WATER SYSTEMS TEST YOUR KNOWLEDGE

REVISION GUIDE BY JERRY WHITELEY Technical Manager at CIPHE

Most people take for granted the supply of hot water to their homes. As a plumber, you will be responsible for ensuring the correct installation and maintenance of their hot system. Therefore, it’s important to be aware of the different types of systems that can be installed, and which systems will be the most suitable for the different types of homes and your customers’ requirements.

The following questions relate to unvented hot water systems. See how many you can answer correctly.

Answer the following questions in the space provided.

Q1 Identify the Building Regulation approved document that covers hot water.

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Q2 In an open vented hot water storage system, where is the expansion water accommodated?

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Q3 True or False: You need a G3 competent persons qualification for installing a thermal store?

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Q4 True or False: I am suitably qualified by the G3 competent person scheme when installing two 500L cylinders in a hospital setting/plant room?

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Q5 Identify the missing component from the list when installing an electric 10L direct wall hung hot water heater. Service valve, strainer, check valve, pressure relief valve.

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Q6 According to the HSE information with regards to hot water not being wasted from dead legs, what is the expected time in seconds before a tap receives full flow running hot water discharge?

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Q7 Which component part of an immersion heater does the live power supply (brown cable) connect onto inside the heater?

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Q8 Identify two mandatory situations to install a thermostatic blending valve with a new bath.

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Q9 With regards to energy performance of a cylinder, name the other Building Regulation applicable?

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Q10 If you have a discharge pipe on the UVHW cylinder of 28mm, then what is the next minimum size up for D 2?

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Q11 Can you connect a D 2 discharge pipe into an adjacent plastic waste pipe carrying wastewater into a soil pipe?

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Q12 When connecting a D 2 discharge pipe into a soil pipe, how must you make the connection seal?

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Q13 As a competent registered installer of UVHW systems, who do you notify of the installation?

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Q14 What is the safe bathing water temperature for a bath in a domestic dwelling?

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Q15 Identify the temperature that Legionella bacteria is most prolific when stored.

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Q16 A plastic push fit pipe system has been applied throughout a hot water system apart from the cylinder cupboard that has copper above the floor. The system has a return to stop dead legs. Is this an acceptable design and installation?

Answer: Go to hip-magazine.co.uk to download exercise answers for free.