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4 Hydronic piping
Installation & Service Manual
Primary / Secondary Piping
EXPANSION TANK
AIR SEPARATOR
PRESSURE REDUCING
VALVE
BACK FLOW
PREVENTER
BALL VALVE
(TYPICAL)
UNION (TYPICAL)
PRESSURE RELIEF
VALVE
FLOW CHECK
VALVE (TYPICAL)
BOILER
TEMPERATURE / PRESSURE
GAUGE
PRESSURE GAUGE
DRAIN
DRAIN POINT
(TYPICAL)
BOILER CIRCULATOR
SYSTEM SUPPLY SENSOR
(WHEN USED)
SYSTEM CIRCULATOR
T
O
S
Y
S
T
E
M
F
R
O
M
S
Y
S
T
E
M
MAKE UP WATER
NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART
Y-STRAINER
(RECOMMENDED)
MAY SUBSTITUTE
LOW LOSS HEADER
FLOW SWITCH
Figure 4-4_Primary / Secondary Piping of a Single Boiler
Please note that these illustrations are meant to show system piping concept only, the installer is responsible for
all equipment and detailing required by local codes.
NOTICE