23
Typical Installation of Direct Vent Water Heater
Discharge
Line
(To Suitable Drain)
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
°F
PRIORITY
POWER
ON/OFF
Remote
Control
Power
Supply
Cord
Water Filter
Drain Valve
Drain
Hose
(To Suitable Drain)
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 figures 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 Piping Arrangement
90° Elbow
Outside Wall
Vent Adapter
1/4” Per Foot Downward
Pitch towards termination
Air Intake Tee
Outside Wall
Outside
Faceplate
Inside Faceplate
4”/7” Concentric
Pipe
Air Intake
Opening
Vent
Termination
with screen
Air Intake Pipe
Vent Outlet
Pipe
Silicone
Silicone
