Water Piping Diagrams
Before installation of water piping review the following:
1.See Mixing Valves on page 72.
2.See Dishwashing Machines on page 72.
3.See
4.See Closed Systems and Thermal Expansion on page 72
5.See Water Line Connections on page 72.
6.If a pump is being installed between a water heater and storage tank or on a building recirculation loop wire according to Figure 64 on page 72.
7.If a pump is being installed in a recirculation loop between the water heater and a commercial dishwasher wire according to Figure 64 or Figure 65 on page 72.
THREE WATER HEATERS, SINGLE TEMPERATURE WITH BUILDING RECIRCULATION
LEGEND
72
WARNING: THIS DRAWING SHOWS SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES; CHECK WITH LOCAL CODES AND ORDINANCES FOR ADDITIONAL REQUIREMENTS.
HOT WATER 
OUTLET
TEMPERATURE & PRESSURE RELIEF VALVE
PRESSURE RELIEF VALVE
CIRCULATING PUMP
TANK OR LINE TEMPERATURE CONTROL
DRAIN
FULL PORT BALL VALVE
CHECK VALVE
TEMPERATURE GAGE
WATER FLOW SWITCH
LINE TEMPERATURE CONTROL
PIPE T&P TO OPEN DRAIN
PIPE T&P TO OPEN DRAIN
PIPE T&P TO OPEN DRAIN
HOT WATER RETURN
FINISHED
FLOOR
COLD WATER
SUPPLY
EXPANSION
TANK