1. HOT & COLD WATER SYSTEMS

2. HOT & COLD WATER SYSTEMS
To heat a property with a boiler, water is heated and then distributed to rooms pipe work. Heat is introduced into the rooms via convection radiators.
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3. HOT & COLD WATER SYSTEMS
A boiler with a cold water header and hot water storage tanks can be used to heat a house.
Alternatively, a combination (“combi”) boiler may be used. Combi boilers are suitable for small dwellings, and simultaneously supply hot water for heating and sinks / taps.

4. HOT & COLD WATER SYSTEMS
Cold water storage tank
Hot water storage tank
Boiler
Radiators

5. HOT & COLD WATER SYSTEMS
Gas meter with incoming mains and isolation valves

6. HOT & COLD WATER SYSTEMS
Close-up of a gas meter readout

7. HOT & COLD WATER SYSTEMS
Gas governor and meter in a large University building

8. HOT & COLD WATER SYSTEMS
Above: Domestic cold water storage tank.
Right: Hot water storage tank

9. HOT & COLD WATER SYSTEMS
Hot water boiler.

10. HOT & COLD WATER SYSTEMS
Isolation valves: if the handle or screw head is parallel to the pipe, then the valve is open.

11. HOT & COLD WATER SYSTEMS
Flexible filling hose of a combi boiler

12. HOT & COLD WATER SYSTEMS
Inside combi boilers

13. HOT & COLD WATER SYSTEMS
The burner of a combi boiler in operation

14. HOT & COLD WATER SYSTEMS
The boiler house of a University building under construction.

15. HOT & COLD WATER SYSTEMS
Hot and cold water is distributed via insulated pipework

16. HOT & COLD WATER SYSTEMS
Pipework in a small domestic heating and hot water system

17. HOT & COLD WATER SYSTEMS
Large panel radiator in an office building.

18. HOT & COLD WATER SYSTEMS
Above, radiators, with fixing brackets and thermostatic radiator valves.

19. HOT & COLD WATER SYSTEMS
Under-floor heating can also be used to heat a building. Hot water is pumped through pipes which are set into the floor screed. As heat rises, it warms the floor slab and the air in the room.