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100309035_2000560888_Rev. A www. reliancewaterheaters .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 valves must
be installed when required
by codes and to ensure safe
temperatures at fixtures.
BURN
HOT
HOT
DANGER
Water heated to a temperature which satisfies 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
SIDE 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 in.
MAX. DEPTH.
AT LEAST 2 in.
GREATER THAN
THE DIAMETER
OF THE WATER
HEATER.
6 in. MAX.
AIR GAP*
CERTAIN
MODELS ARE
EQUIPPED WITH
SIDE PLUMBING
CONNECTIONS
FOR SPACE
HEATING.
* NOTE: THE
T&P VALVE
DISCHARGE
PIPE SHALL
BE PIPED
DIRECTLY TO
THE DRAIN
OR EXTERNAL
TO THE
BUILDING
Figure 8.
This appliance has been design certified as complying
with American National Standard/CSA Standard for water
heaters and certain models with side plumbing connections
are considered suitable for Water (Potable) Heating and
Space Heating.
Note: Do not use in 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 in.
MAX. DEPTH.
AT LEAST 2 in.
GREATER THAN
THE DIAMETER
OF THE WATER
HEATER.
6 in. MAX.
AIR GAP*
* NOTE: THE
T&P VALVE
DISCHARGE
PIPE SHALL
BE PIPED
DIRECTLY TO
THE DRAIN
OR EXTERNAL
TO THE
BUILDING
NON-TEMPERED
WATER SUPPLY
NON-TEMPERED
WATER RETURN
MASSACHUSETTS:
INSTALL A VACUUM
RELIEF IN COLD
WATER LINE PER
SECTION 19 MGL
142.
Figure 9.
SHUT-OFF
VALVE
COLD-
WATER
SUPPLY
TEMPERED
POTABLE
WATER
MIXING
VALVE
NON-
TEMPERED
WATER
SUPPLY
NON-
TEMPERED
WATER
RETURN
TO COLD
INLET
TO HOT
OUTLET
Figure 10.
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