Installation of Domestic Hot Water systems part 4

What is required for a standard, gravity-fed hot water system to function effectively?

• High head height

• Low head height

• Small pipe diameter

• Low pressure

Fill in the blank: The greater the head height, the greater the ______.

• A) Flow rate

• B) Pressure

• C) Temperature

• D) Volume

In the installation diagram, the blue pipes are used to carry ______.

• Hot water

• Cold water

• Steam

• Gas

What happens when a hot tap is opened in a hot water system?

• Cold water is pushed by gravity into the hot water cylinder.

• Hot water is pushed by gravity into the cold water cylinder.

• Cold water is pushed by a pump into the hot water cylinder.

• Hot water is pushed by a pump into the cold water cylinder.

When a hot tap is opened, the weight of the water under gravity pushes the cold water from the CWSC down the cold feed pipe into the ________.

• hot water cylinder

• cold water cylinder

• hot distribution pipe

• outlet

What is the primary function of the hot water cylinder shown at the bottom of the installation diagram?

• To store cold water

• To store and heat water

• To filter water

• To circulate water

What type of connector is used for the connection to the CWSC of the cold feed?

• Compression

• Push fit

• Both A and B

• None of the above

Fill in the blank: The cold feed is sized according to _____.

• BSEN806

• BSEN6800

• BS6900

• BS7000

Why is the cold feed always positioned above the cold distribution?

• To prevent airlocks

• To ensure the cistern refills with water

• To avoid scalding

• To prevent the CWSC from emptying of water.

The highest connection is the cold feed, which helps avoid any ______ to people, particularly in a shower.

• freezing

• scalding

• flooding

• drying