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20
Primary Piping
1
2
12"
Max.
To
system
4
7
5
2
2
3
2
From system
Cold Water
fill supply
Supply
flow
2
Return
flow
8
8
1
To
system
2
2
12"
Max.
3
4
7
6
2
2
2
Supply
flow
Return
flow
From system
Cold Water
fill supply
Near Appliance Piping
1. Appliance Circulator
2. Shut Off valve
3. Expansion tank
4. Auto fill valve
5. Tank fitting
6. Automatic air vent
7. Air Separator
8. Plug (by others)
To
system
From system
Supply
flow
Return
flow
Cold Water
fill supply
2
1
7
6
8
2
12"
Max.
3
42
2
2
Fig. 7 : Near Appliance Primary
Piping with a Diaphragm
Type Expansion Tank
Fig. 7A : Near Appliance Primary
Piping with Closed -
Type Expansion Tank
Fig. 7B : Near Appliance Primary Piping
with Diaphragm - Type Expansion
Tank (Alternate Circulator Location)