19
3
System piping
(continued)
IMG00362
Y-STRAINER
(RECOMMENDED)
BALL VALVE
(TYPICAL)
UNION
(TYPICAL)
WATER HEATER
(TYPICAL)
WATER HEATER
CIRCULATOR
(TYPICAL)
EXPANSION TANK
COLD WATER
SUPPLY
FLOW CHECK
VALVE (TYPICAL)
BUILDING RETURN
HOT WATER
SUPPLY
THERMOMETER
THERMOMETER
& PRESSURE
RELIEF VALVE
STORAGE TANK
DRAIN
Figure 3-9 Double Heater - Single Tank
Model
Number of Units
2
3
4
5
6
7
8
Required Pipe Sizes in NPT
151
1 1/2"
2"
2"
2"
2 1/2"
3"
3"
200
1 1/2"
2"
2 1/2" 2 1/2"
3"
3"
4"
286
2"
2 1/2" 2 1/2"
3"
3"
4"
4"
400
2 1/2"
3"
3 1/2"
4"
4"
5"
5"
501
3"
3 1/2"
4"
5"
5"
5"
6"
601
3"
3 1/2"
4"
5"
5"
5"
6"
701
3"
4"
5"
5"
6"
6"
6"
801
3"
4"
5"
6"
6"
6"
6"
NOTICE
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
for all equipment and detailing required by local codes.
Indoor tank shown for illustration purposes.
The piping will not support the weight of the water heater circulator pump. Do not attempt to support
the weight of the water heater circulator pump with the piping or its accessories. Refer to the pump
manufacturer’s installation instructions. Failure to comply could result in severe personal injury, death, or
substantial property damage.
CAUTION
Outdoor Armor Water Heater
Installation & Operation Manual
