Place furnace tape around the joints to ensure tight seals.
Water heater vent hood sheet metal screws.
Only use the draft hood that is supplied with the water heater.
If the recommended vent pipe diameter is larger than the vent hood opening don t install a reducer.
Cut the pipe to the appropriate length with sheet metal shears.
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.
Residential size water heaters have usually 3 or 4 diameter draft hoods some accept both sizes.
Water heater inspection draft hood.
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.
Some adjustments might be needed as long as the original size and shape are kept.
Measure a straight section of new galvanized vent pipe to rise as.
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.
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.
Fasten the flue pipe and fittings together with sheet metal screws.
Use three screws per joint.
Check the installation manual for the recommended diameter vent pipe for your new heater.
The collar of the draft hood will have a profile that allows for different diameter vent pipes installation picture.
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.
On 2020 03 18 by mod cold single wall metal vents may not vent the water heater properly.
A draft hood must only be connected to an equal or larger sized vent pipe as allowed by code.
Do not use regular duct tape to secure or seal connections.
Draft hood and gas water heater vent pipe connections.
Attach the vent pipe to the draft hood using the sheet metal self tapping screws.
Make sure to have the vent pipe rise vertically at least 12 before installing the elbow.
Some building inspectors don t even allow aluminum tape on joints.
Water heater draft hood s diameter depends on the size btu s of the appliance.
