Residential size water heaters have usually 3 or 4 diameter draft hoods some accept both sizes.
Water heater vent hood sheet metal screws.
Measure a straight section of new galvanized vent pipe to rise as.
Attach the vent pipe to the draft hood using the sheet metal self tapping screws.
If the recommended vent pipe diameter is larger than the vent hood opening don t install a reducer.
A draft hood must only be connected to an equal or larger sized vent pipe as allowed by code.
Cut the pipe to the appropriate length with sheet metal shears.
The collar of the draft hood will have a profile that allows for different diameter vent pipes installation picture.
Make sure to have the vent pipe rise vertically at least 12 before installing the elbow.
Look to see if the draft hood over the vent hole is centered and if the legs are straight and secured by screws this may depend on the design of the pipe.
Water heater draft hood s diameter depends on the size btu s of the appliance.
Seal joint at bottom of vent pipe increaser 4 inch vent pipe 3 inch draft hood when two vent pipes are made by different manufacturers they may not fit together.
Use three screws per joint.
Draft hood and gas water heater vent pipe connections.
Fasten the flue pipe and fittings together with sheet metal screws.
Do not use regular duct tape to secure or seal connections.
Turn the water heater thermostat back to the appropriate setting.
Check the installation manual for the recommended diameter vent pipe for your new heater.
Using the flexible gas hose connect the gas control valve on the water heater and the gas supply line.
The size of the vent pipe must not be smaller than the draft hood and connection must be airtight to prevent the leak of the flue gases.
Water heater inspection draft hood.
While installing the vent pipe over the draft hood you must secure the connection with the sheet metal screw.
Place furnace tape around the joints to ensure tight seals.
Only use the draft hood that is supplied with the water heater.
Even if you don t face a fire hazard a single wall vent might for some heaters be too cold and thus the heater might not vent properly in some climates locations.
The connection between the draft hood and the vent pipe should be secured with sheet metal screws three per connection on a single wall pipe are recommended.
Snap the new draft hood onto the water heater and secure it with sheet metal screws.
Some adjustments might be needed as long as the original size and shape are kept.
