23
Typical Installation of Direct Vent Water Heater
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.
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