19
Primary Piping
8
9
9
9
9 9
9
11
3
5
1
12
5
3
4
4
6
7
2
4
4
10
10
9
9
Note 2 & 3
Cold
Water
Fill
Note 4
Notes:
1. Install a minimum of 12 straight
pipe diameters upstream of all
circulators.
2. Install closely spaced tees a max-
imum of 4 pipe diameters center
to center
3. Install a minimum of 6 straight
pipe diameters upstream and
down stream of closely spaced
tees.
4. Adjust pressure differential
bypass valve on the zone with
highest pressure drop to avoid
velocity noise.
1. Modulating Delta
2. Pressure Relief Valve
3. Automatic Air Vent
4. Drain/Purge Valve
5. Circulator
6. Air Separator
7. Expansion Tank - Diaphragm
8. Automatic Fill Valve
9. Isolation Valve
10. Zone Valve
11. Bypass Valve
12. Flow Check Valve
Fig. 8: Primar
y Piping - Zoning with Zone
V
alves - Preferred Piping
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