Page 49 - Building services book

• Valves - Used to control the flow along a pipeline.

Tpyes of valves :

• Globe valves –

Used on high–pressure system

• Stop valves –

- Used to domestic water installation.

- When the valve is used on the cold water service

pipework, the jumper should be loose which tends to

act as a non –return valve and prevent backflow into

the main.