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americanwaterheater .com 11
WATER PIPING - MIXING VALVE USAGE
Mixing Valves
Water temperature over
125°F can cause severe
burns instantly resulting in
severe injury or death.
Children, the elderly and the
disabled and are at highest
risk of scald injury.
Feel water before bathing or
showering.
Temperature limiting devices
such as mixing must be
installed when required by
codes and to ensure safe
temperatures at fixtures.
BURN
HOT
HOT
DANGER
Water heated to a temperature which satis
fi
es space
heating, clothes washing, dish washing, and other
sanitizing needs can scald and cause permanent injury
upon contact. Short repeated heating cycles caused by
small hot-water uses can cause a temperature increase of
the hot water by 20F° higher than the heater’s temperature
settings.
MIXING
VALVE
SHUT-OFF
VALVE
SUGGESTED PIPING ARRANGEMENT
FOR TOP CONNECTIONS
COLD-WATER
INLET
TEMPERED
POTABLE WATER
DISCHARGE
PIPE (DO NOT
CAP OR PLUG)
TEMPERATURE-
PRESSURE
RELIEF VALVE
DRAIN
VALVE
METAL DRAIN
PAN 1.75” MAX.
DEPTH. AT LEAST 2”
GREATER THAN THE
DIAMETER OF THE
WATER HEATER.
6” MAX. AIR
GAP*
CERTAIN MODELS
ARE EQUIPPED WITH
SIDE PLUMBING
CONNECTIONS FOR
SPACE HEATING.
THE HOT AND
COLD FITTING
ASSEMBLIES (PART
#9001262005) CAN
BE ORDERED
THROUGH THE
MANUFACTURER
* NOTE: THE
T&P VALVE
DISCHARGE
PIPE MUST
BE PIPED
DIRECTLY TO
THE DRAIN
OR EXTERNAL
TO THE
BUILDING
MASSACHUSETTS: INSTALL A VACUUM RELIEF IN COLD WATER LINE
PER SECTION 19 MGL 142.
Figure 7
This appliance has been design certi
fi
ed as complying with
ANSI/CSA Standard for water heaters and is considered
suitable for combination Water (Potable) Heating and
Space Heating but not space heating only applications.
The water supply pressure should not exceed 80 psi. If this
occurs, a pressure reducing valve with a bypass should be
installed in the cold water inlet line. This should be placed
on the supply to the entire house in order to maintain equal
hot and cold water pressures.
MIXING VALVE
SHUT-OFF
VALVE
SUGGESTED PIPING
ARRANGEMENT FOR
TOP CONNECTIONS
COLD-WATER
INLET
TEMPERED
POTABLE WATER
DISCHARGE
PIPE (DO NOT
CAP OR PLUG)
TEMPERATURE-
PRESSURE
RELIEF VALVE
DRAIN
VALVE
METAL DRAIN
PAN 1.75”
MAX. DEPTH.
AT LEAST 2”
GREATER THAN
THE DIAMETER
OF THE WATER
HEATER.
6” MAX.
AIR GAP*
* NOTE: THE
T&P VALVE
DISCHARGE PIPE
MUST BE PIPED
DIRECTLY TO
THE DRAIN OR
EXTERNAL TO
THE BUILDING
MASSACHUSETTS: INSTALL A VACUUM RELIEF IN COLD WATER LINE
PER SECTION 19 MGL 142.
NON-TEMPERED
WATER SUPPLY
NON-TEMPERED
WATER RETURN
Figure 8
