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7
Domestic water heaters
Figure 7-3_Multiple water heater piping with a single storage tank
COMMON MANIFOLD SIZE (Min.)
Models: 497 - 747
Number of Units
GPM
2
120
3
180
4
240
5
300
6
360
7
420
8
480
BUILDING
HOT
WATER
SUPPLY
RELIEF
VALVE
LOCK-TEMP
STORAGE
TANK
DRAIN
*Please note that these illustrations are meant to show system piping concept only, the installer is responsible
NOTICE
for all equipment and detailing required by local codes.
54
Diameter
(in.)
3 1/2
4
5
5
6
6
6
MIXING
VALVE
DIR #2000570592_000
Installation & Service Manual
COMMON MANIFOLD SIZE (Min.)
Number of Units
COLD
WATER
SUPPLY
Y-STRAINER
(TYPICAL)
BUILDING RECIRCULATION
FILTER (IF REQUIRED SEE
SECTION 7)
Models: 987 - 2067
Diameter
GPM
(in.)
2
180
3
270
4
360
5
450
6
540
7
630
8
720
REFERENCE CHART FOR
COMMON MANIFOLD SIZE
BUILDING
RETURN
4
5
6
6
6
8
8
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