For gas water heaters be sure to turn off the gas line leading to the water heater and disconnect the line where it enters the tank.
Replacing floor under water heater.
The home mender dustin luby shows us how to repair that unsightly rot hole in your floor to prepare it for a new.
This is the center of the room and the beginning point for tiling.
Look inside and examine the cross section of your existing flooring to determine the thickness and type of subflooring material.
Replace the water heater with a new unit and reconnect the pipes and power.
Set the blade of a circular saw to the thickness.
Repeat the process with the remaining two marks.
This keeps air from getting trapped in the water lines.
If you don t have a vent set the blade to cut 1 inch deep.
Make sure the hot water faucets are still open and turn on the water supply.
Put the water heater in place and connect the pipes.
If it has overlay include that in the measurement.
Stretch a chalk line between two opposite marks and snap a line across the floor.
Let the water flow from each faucet for one minute before turning them off.
Remove a floor vent using a screwdriver.
First remove the heater and repair the floor on your terms with the idea that you may or may not have to replace the heater second wait untill the heater quits at the worst possible time or more likely falls through the floor again at the worst possible time personally i would rather plan on doing it when i feel like doing the job.