I was listening to a home improvement show today and the host offered an interesting way of testing the function of a tank hot water heater. First you wait until the burner of elements have quit heating. Then go into the bath tube with a five gallon bucket. Run the water until it gets hot then run the bucket full and check the temperature with a candy or cooking therometer. Lets say it is 140 degrees F. Record this temperature. Dump the water and fill another bucket. At this point leave the therometer in the water stream and continously monitore the water temperature. Measure and count the number of five gallon buckets you dump. When the temperature has dropped 30 degrees. In the case where we started at 140 that would be 110. Shut off the water and see how many total gallons have been run out of the tank. If that number equals 70 percent of the capacity of the tank it is doing ok. As in a 30 gallon tank that would be 21 gallons while a 40 gallon tank would be 28. If you get more then great if less the problem might the tube that directs the cold water to the bottom of the tank has a hole or is corroded off or it may be so full of lime you can't even heat that many gallons. Well I thought it was interesting enough to pass on. Yes for us it would require a talking therometer and keeping a close watch on that bucket so it didn't run over. Ron
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