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number for more information.
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MIXING VALVES
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
Children, the elderly and the
physically or mentally disabled are at
highest risk for 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.
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52 through 54 in Piping Diagrams beginning on Page 58.
HOT WATER
OUTLET
TO TANK
INLET
CHECK
VALVE
MIXING
VALVE
COLD
WATER
INLET
TEMPERED WATER
OUTLET
12” TO 15”
(30-38 cm)
CHECK
VALVE
Figure 8
Mixing valves are available at plumbing supply stores. Consult a
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Table 4
Water Temperature
°F (°C)
Time for 1st Degree Burn
(Less Severe Burns)
Time for Permanent
Burns
2nd & 3rd Degree
(Most Severe Burns)
110 (43.3) QRUPDOVKRZHUWHPS
116 (46.7) SDLQWKUHVKROG
116 (46.7) 35 minutes 45 minutes
122 (50) 1 minute 5 minutes
131 (55) VHFRQGV VHFRQGV
140 (60) VHFRQGV VHFRQGV
149 (65) VHFRQG VHFRQGV
154 (67.8) instantaneous VHFRQG
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