This is called a common vent configuration.
Getting water heater into attic.
Take a close look at any plumbing and gas fittings in the vicinity of the water heater for wet spots or signs of rust and corrosion and be sure to check the outer tank for any signs of rust.
How to hoist 50 gallon water heater into attic.
Use a rope to attach to the ratchet strap 3.
Most importantly along the seam of the tank.
This is far less expensive than your water heater leaking and causing thousands of dollars worth of water damage.
The water will flood rooms in the lower level and do the damage.
Water heater ducts may lead directly outdoors or they may tie into a larger vent duct that also serves a gas or propane furnace or boiler in the home.
Use a cargo tie down ratcheting strap around the heater 2.
Go up into the attic and stand on the rafters not the stairs 4.
Another option is to choose a tankless water heaterto be installed in your attic.
If the builder has already installed your water heater in the attic you can get it moved to another location in the house or into the garage.
During the winter time a water heater and piping in the attic space should be insulated to protect against freezing temperatures.
Raise the heater up have a second person control the motion and guide it through the access point.