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Installing the water heater:
Typical Installation of Water Heater
(Venting Required for Indoor Models Only)
To Hot Water
Faucet(s)
Relief
Valve
Union
Drain Valve
6" (15 cm) Air Gap
Manual Gas
Appliance
Shut-off
(supplied)
Sediment
Trap
Manual
Gas Supply Line
Shut-off
Valve
Union
Cap
Cold Water
Supply
Shut-off
Valve
Check
Valve
1/4" Per Foot Downward Pit
90° Elbow
Vent Adapter
Power
Supply
Cord
Water Filter
Drain Valve
Drain
Hose
(To Suitable Drain)
Discharge
Line
(To Suitable Drain)
Air Intake
Filter
NOTICE: The National Fuel Gas Code (NFGC) and B149 mandates a manual gas shut-off valve: See
NFGC/B149 for complete instructions. Local codes or plumbing authority requirements may vary from
the instructions or diagrams provided and take precedent over these instructions.
Vacuum Relief Valve
(Not Supplied)
If required, install per local codes
and valve manufacturer’s
instructions.
Water Inlet
Water
Outlet
Drain
Pressure Relief
Valve
Hot Water Service
Valve
Cold Water
Service Valve
Alternate Water Piping Arrangement
with Optional Valve Kit
Discharge
Line
(To Suitable Drain)
To Hot Water
Faucet(s)
Relief
Va lve
Union
Drain Valve
6" (15 cm) Air Gap
Manual Gas
Appliance
Shut-off
(supplied)
Sediment
Trap
Manual
Gas Supply Line
Shut-off
Va lve
Union
Cap
Cold Water
Supply
Shut-off
Valve
Check
Va lve
Water Filter
Drain Valve
On/Off
Switch
Conduit for
Wiring to Unit
Flue Terminal
¥F
PRIORITY
POWER
ON/OFF
Remote
Control
Indoor Models
Outdoor Models
Install indoors only.