Water Regulations and Hot Water Systems Quiz

Which of the following cylinder types is a direct cylinder?

• A

• B

• C

State the minimum size of open vent pipe which terminates over a cold water storage cistern that is allowed under the Water Regulations for a secondary domestic hot water system.

• 15mm

• 22mm

• 28mm

• 32mm

What is the recommended temperature setting for the thermostat to an immersion heater in a hot water storage cylinder?

• 90ºC

• 70ºC

• 60ºC

• 50ºC

The recommended minimum size of primary circulation pipework between a small (under 35kW) solid fuel boiler serving a direct hot water cylinder only is:

• 15mm

• 22mm

• 28mm

• 35mm

What is the electrical power rating of a typical domestic immersion heater?

• 3kW

• 3.7kW

• 4kW

• 10kW

The difference between a single feed and a double feed indirect cylinder is:

• The single feed cylinder requires a booster pump

• The single feed cylinder does not need a separate feed and expansion cistern

• The single feed cylinder requires a twin port motorised valve arrangement

• The single feed cylinder does not require an open vent pipe to the secondary storage cistern

The following diagram shows an indirect hot water system. Which section of pipe is missing from the diagram?

• Primary cold feed pipe

• Primary open vent pipe

• Secondary cold feed pipe

• Secondary open vent pipe

What type of cylinder is shown below?

• Single feed indirect cylinder

• Direct cylinder

• Combination cylinder

• Unvented cylinder

Where should the primary open vent pipe in a double feed indirect hot water system terminate?

• Over the cold water storage cistern

• Over the feed and expansion cistern

• To the outside of the property

• In an expansion relief valve

An unvented cylinder has a range of safety controls to prevent hot water reaching which temperature?

• 85ºC

• 90ºC

• 95ºC

• 100ºC