Does Water Heater Sit On Floor

I just had my 50 gas water heater replaced because it was 13 years old and i figured sooner or later it s gonna bust and flood the basement.
Does water heater sit on floor. The code states that appliances having an ignition source shall be elevated not less than 18 inches 457 mm above the floor in garages and the purpose of this stipulation is fire safety. They sat it directly on the floor not on blocks or a stand. I am just wondering if i should call the installer back and have him put it up on something. Is it ok for a water heater to be sitting directly on a concrete floor rather than above it on blocks or.
Buy a water heater stand and watch your water heater last for generations. How to level a hot water heater with shims. I have never seen a hot water heater that was not sitting on legs or concrete blocks. The installer didn t bother putting anything under the electric water heater.
The uniform plumbing code which establishes standards nationwide says that the flame or sparking mechanism in a gas water heater must be at least 18 inches off the ground. The basement floor is concrete. Every water heater i ve ever had has always had short legs under it to raise it 2 3 inches off the floor. It just sits directly on the concrete floor.
My advice is it is still a water heater unit and ought to be raised 18 inches off the ground to avoid issues with the government. The floor drain is about 3 away. I just had a new hot water heater installed and it is sitting directly on the concrete floor in my basement. All real estate.
It is not necessary for electric water heaters or gas water heaters manufactured after mid 2003. Looking at home depot s site it looks like the rheem units they sell all come with no legs and sit directly on the floor as with the richmond units i see at menards. New water heaters or water heaters that are placed on an un level surface need to be leveled and shimmed for them to work properly.