5
DIAGRAM C
- Pressure < 4.2 bar & pipework length < 1.4m (5 litre)
2.8m (10 litre)
4.2m (15 litre)
DIAGRAM D
- Pressure > 4.2 bar & pipework length < 1.4m (5 litre)
2.8m (10 litre)
4.2m (15 litre)
Hot
Cold
T piece
Speedflow
Pressure
relief valve
To drain
Nearest cold
draw off
Expansion
vessel
Check
valve
Service valve
Cold water mains
SF3 (expansion) kit needed.
Hot
Cold
T piece
Speedflow
Pressure
relief valve
To drain
Nearest cold
draw off
Service valve
Cold water mains
Length of pipework
SF4 needed (pressure & expansion) kit needed.
Expansion
vessel
Check
valve
Pressure
reducing
valve
Length of pipework