Level 2 Plumbing - Hot Water

What are two things that WRAS does?

• Publishes the water regulations guides

• Lists approved fittings

• Controls the water supply

• Offers guidance

What is centralised hot water system?

• When water is heated and/or stored centrally in the building and is distributed from that point to all hot water outlets

• When water is heated and/or stored locally to one specific draw-off point area

What is a localised hot water system?

• Where water is heated and/or stored locally to one specific draw-off point area.

• Where water is heated and/or stored centrally in the building and is distributed from that point to all hot water outlets.

What gives an open vented system it's working pressure?

• The head height of the CWSC

• The flow rate

• The size of the pipe

• The temperature

BS6700 states that an open vent must be a minimum of ____ and have no valves in it

• 15mm

• 22mm

• 28mm

• 32mm

The hot distribution pipe should be a minimum of _____ long before it connects to the vent pipe

• 450mm

• 650mm

• 22mm

• 350mm

The primary function of the vent pipe is to act as a what?

• Safety device

• Temperature control

• Cooling device

• Stop tap

What is a single feed system?

• The single feed system uses a primatic cylinder which relies on an air bubble to separate the primary and secondary waters

• The single feed system uses an indirect cylinder, and the primary and secondary waters are separated by a coil. The primaries are filled from the F&E and the secondaries are filled from the CWSC

What is a double feed system?

• A double feed system uses an indirect cylinder, and the primary and secondary waters are separated by a coil. The primaries are filled from the F&E and the secondaries are filled from the CWSC.

• A double feed system uses a primatic cylinder, which relies on an air bubble to separate the primary and secondary waters. Both are filled via a single feed pipe from the CWSC.

What are the main advantages of an indirect system?

• Part L compliant

• Various sizes of cylinders available

• The system can be fully pumped

• All the above