17
Piping Legend
FIGURE 5-4 System Piping
System
Return
System
Supply
Safety Relief Valve
WALL
MOUNTED
ONLY
Table 3 - System Piping Configurations
Single Boiler
Two Pipe Zoned System
With Zone Valves
figure 5-5
With Zone Pumps
figure 5-6
Primary/Secondary Pumping
Closed External Primary Loop
figure 5-7A
Open External Primary Loop
figure 5-7B
Multiple Boilers
Two Pipe Zoned System
With Zone Valves
figure 5-8A
With Zone Pumps
Not Shown
Primary/Secondary Pumping
Closed External Primary Loop
figure 5-8B
Open External Primary Loop
figure 5-8C
5 - HYDRONIC PIPING
Note
Illustrations are meant to show system piping
concept only. Installer responsible for all
equipment and detailing required by authority
having jurisdiction.
Check Local
Codes For
Maximum
Distance To
Floor
PN 240011320 Rev. G 10/01/2021]
