Attach the vent pipe to the draft hood using the sheet metal self tapping screws.
Water heater vent hood sheet metal screws.
Using the flexible gas hose connect the gas control valve on the water heater and the gas supply line.
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.
The collar of the draft hood will have a profile that allows for different diameter vent pipes installation picture.
Some building inspectors don t even allow aluminum tape on joints.
Only use the draft hood that is supplied with the water heater.
Fasten the flue pipe and fittings together with sheet metal screws.
Water heater draft hood s diameter depends on the size btu s of the appliance.
If the recommended vent pipe diameter is larger than the vent hood opening don t install a reducer.
Snap the new draft hood onto the water heater and secure it with sheet metal screws.
On 2020 03 18 by mod cold single wall metal vents may not vent the water heater properly.
Some adjustments might be needed as long as the original size and shape are kept.
Check to see if the draft hood and water heated flue pipe connections are properly secured with sheet metal screws.
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.
Draft hood and gas water heater vent pipe connections.
Place furnace tape around the joints to ensure tight seals.
Use three screws per joint.
Residential size water heaters have usually 3 or 4 diameter draft hoods some accept both sizes.
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.
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.
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.
Make sure to have the vent pipe rise vertically at least 12 before installing the elbow.
Turn the water heater thermostat back to the appropriate setting.
Measure a straight section of new galvanized vent pipe to rise as.
Do not use regular duct tape to secure or seal connections.
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.