19
5.12 C
ONNECTING
P
IPEWORK
A
B
C
D
A
B
C
D
PR Valve
PR Valve relief
plumbed to low level
Ø15mm
PRV discharge
vessel
Expansion Vessel
System Drain
Automatic Air Vent
Pipes Ø15mm or Ø22mm
see 5.%
F
IG
. 5.12
A
C
ONNECTING
P
IPEWORK
Shut Off
valve
Return
Flow