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4. See Closed Systems and Thermal Expansion on page 14
5. See Water Line Connections on page 40.
6. If a pump is being installed between a water heater and storage tank or on a building
recirculation loop wire according to Figure 63 on page 66.
7. If a pump is being installed in a recirculation loop between the water heater and a
commercial dishwasher wire according to Figure 63 or Figure 64 on page 66.
WATER PIPING DIAGRAMS
Before installation of water piping review the following:
1. See Mixing Valves on page 14.
2. See Dishwashing Machines on page 14.
3. See Temperature-Pressure Relief Valve on page 15.
ONE WATER HEATER, TWO TEMPERATURE
WITH HIGH TEMPERAURE LOOP RECIRCULATION
WITH BUILDING RECIRCULATION
LEGEND
TEMPERATURE & PRESSURE
RELIEF VALVE
PRESSURE RELIEF VALVE
CIRCULATING PUMP
DRAIN
FULL PORT BALL VALVE
TEMPERATURE GAGE
WATER FLOW SWITCH
CHECK VALVE
MIXING VALVE
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL REQUIREMENTS.
HOT WATER
OUTLET
HO
12” TO 15”
MINIMUM
T
COLD
TEMPERED
WATER
TO FIXTURES
COLD WATER
SUPPLY
TEMPERED WATER
RETURN
HOT WATER
RETURN
EXPANSION
TANK
PIPE T&P TO
OPEN DRAIN
LINE TEMPERATURE
CONTROL
LINE TEMPERATURE
CONTROL
TANK OR LINE TEMPERATURE
CONTROL
MIXING VALVE