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Figure 9-3_Multiple Water Heater Piping with a Single Storage Tank
MIXING VALVE
COLD WATER SUPPLY
MIN. 4” COMMON
MANIFOLD SIZE
BUILDING HOT
WATER SUPPLY
RELIEF VALVE
LOCK-TEMP
STORAGE TANK
DRAIN
BUILDING RETURN
COMMON MANIFOLD SIZE (Min.)
Models: 502, 752, 1002, & 1302
Number of Units GPM
Diameter
(in.)
2 150 3 1/2
3 225 4
4 300 5
5 375 6
6 450 6
7 525 6
8 600 8
COMMON MANIFOLD SIZE (Min.)
Models: 1501, 1701, & 2001
Number of Units GPM
Diameter
(in.)
2 180 4
3 270 5
4 360 6
5 450 6
6 540 6
7 630 8
8 720 8
9 Domestic water heaters (continued)
Installation & Operation Manual