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  #1  
Old 3/18/13, 3:19 PM
Colton Hagler Colton Hagler is offline
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Default 2 water heaters piped together

I've never seen this with two water heaters. The hot water of the first goes to the cold water of the second. Is this allowed?
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  #2  
Old 3/18/13, 3:38 PM
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Default Re: 2 water heaters piped together

Not a problem though I like to see more isolation valves.



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  #3  
Old 3/18/13, 3:40 PM
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Roy D. Cooke, Sr Roy D. Cooke, Sr is offline
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Default Re: 2 water heaters piped together

Yes see ..https://www.nachi.org/forum/f79/two-w...7/#post1002968
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Old 3/18/13, 3:44 PM
Christopher Currins, CMI Christopher Currins, CMI is offline
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Default Re: 2 water heaters piped together

What you're showing is called Series Installation. It's allowed. There are different opinions of it's value of operation.

It's looks like these are 40 gallon tanks. Unless the hot water demand at this house requires that much hot water to be available, you may recommend turning off the gas supply to the upstream water heater.

This link describes both series and parallel WH installation.
http://www.chinawinds.co.uk/diy_tips..._parallel.html
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Old 3/18/13, 6:06 PM
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Mike Auger Mike Auger is offline
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Default Re: 2 water heaters piped together

It's OK, a common application is in a multi-unit property. Like a complex where there's one water heater for several units. For a single family likely overkill, but allowed just the same.



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  #6  
Old 3/18/13, 9:35 PM
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Joseph Hagarty, CMI Joseph Hagarty, CMI is offline
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Default Re: 2 water heaters piped together

http://www.bradfordwhite.com/rightspec.asp

When using the residential sizing, you will find 2 water heaters recommended quite often with larger homes and a family of 4 or more.



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  #7  
Old 3/18/13, 9:58 PM
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Chuck Evans, TREC 7657 Chuck Evans, TREC 7657 is online now
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Default Re: 2 water heaters piped together

Quote:
Originally Posted by mauger View Post
It's OK, a common application is in a multi-unit property. Like a complex where there's one water heater for several units. For a single family likely overkill, but allowed just the same.
Most single family homes that I inspect have multiple water heaters.



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  #8  
Old 3/25/13, 9:10 PM
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Richard W. Washington, TREC#7238 Richard W. Washington, TREC#7238 is offline
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Default Re: 2 water heaters piped together

Typically 3, 3 1/2, or 4 full bath's will have 2 wh's.



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