Two Water Heater Tanks Connected Together


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Old 11-09-09, 04:58 PM
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Two Water Heater Tanks Connected Together

I got two RHEEM water heaters (each 40 gallons). They both are connected together. Two questions:

1) What is the industry term used for this type of installation (connecting two tanks together) ?
2) What is the recommended thermostat setting for this type of arrangement? Should one thermostat be set at higher?

Thank you in advance for your help in this matter.
 
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Old 11-09-09, 05:17 PM
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Are they connected together in series, so that the hot water in one tank empties into the next one? Probably not, but if so the first tank would be set nto a lower temperature than the second.

If they are in a parallel arrangement so both tanks provide the same connection to the hot water piping, they should be set to the same temperature.
 
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Old 11-09-09, 06:12 PM
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SeattlePioneer-

Thank you! I want to say they are connected in series (cold water goes in to TANK 1 - hot water from TANK 1 empties to TANK 2 - TANK 2 is connected to hot water piping).

In this case, TANK 1 thermostat should be set lower, right? If so how many notches (each notch on the thermostat is 10 degrees I think)?

Thanks again.
 
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Old 11-11-09, 05:21 AM
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Help! Any body know what is the recommended temperature difference between the two thermostats?
 
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Old 11-11-09, 06:47 AM
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Set the temp. for the SECOND WH at 120 degrees so that you don't get scalded by the hot water. The temp. for the first WH can be that or less. How much less doesn't matter.
 
 

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