Final answer:
The relief valve for a water heater must be installed outside the building, typically near the floor.
Step-by-step explanation:
The relief valve for a water heater must be installed outside the building, typically near the floor. This is to ensure that if the valve releases hot water or steam, it will not cause damage to the inside of the building. The relief valve is a safety feature that prevents the water heater from building up excessive pressure, which could lead to explosions or other dangerous situations.
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