How much will a water heater tank weighing 30 lbs. weigh when it is filled with water?

To determine the total weight of a water heater tank when it is filled with water, you first need to account for the weight of the tank itself and then add the weight of the water it holds. A standard residential water heater typically has a capacity of 40 to 50 gallons.

Water weighs approximately 8.34 lbs per gallon. If we assume the water heater is filled with 40 gallons of water, the weight of the water would be calculated as follows:

Weight of water = 40 gallons × 8.34 lbs/gallon = 333.6 lbs.

Now, adding the weight of the empty tank (30 lbs) to the weight of the water gives:

Total weight = 30 lbs (tank) + 333.6 lbs (water) = 363.6 lbs.

If the water heater is larger, for instance, 50 gallons, then:

Weight of water = 50 gallons × 8.34 lbs/gallon = 417 lbs.

Total weight = 30 lbs (tank) + 417 lbs (water) = 447 lbs.

Therefore, considering the typical sizes of residential water heaters, the total weight when filled with water would likely fall within the range of 420-425 lbs