Boiler
Supply
Boiler
Return
System
Supply
Cold
Water
Fill
System
Return
12"
Max.
Boiler
Supply
Boiler
Return
System
Supply
Cold
Water
Fill
System
Return
12"
Max.
Minimum
¾” Piping
Fig. 8 : Near Boiler Piping - Closed Type Expansion Tank
Fig. 7: Near Boiler Piping - Diaphragm Expansion Tank
Note:
Pitch horizontal piping
upwards (1” of pitch per 5 ft
of piping) towards expansion
tank.
18
4.0
Boiler Piping