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Old 01-14-2007, 11:15 AM   #1
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new electric water heater - Vacuum breaker necessary?


Installing a new 50 Gal electric water heater. I'm moving the unit to the back of the room. Do I need to install a vacuum breaker on the cold supply, I've heard yes and I've heard no.

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Old 01-14-2007, 12:50 PM   #2
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new electric water heater - Vacuum breaker necessary?


Vacuum breaker?

I don't know what you mean by this.

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Old 01-15-2007, 08:15 AM   #3
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new electric water heater - Vacuum breaker necessary?


Hey Ron, I think maybe different names are the problem. Anti-siphon device? Backflow preventer?

http://en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

I just say vacuum breaker because the device I happened to have is a vacuum breaker, w. the little hood on top.

If you do say yes, the other question is, do I have to install it upright or can I install it upside down or verticle??

Thanks again!
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Old 01-15-2007, 08:18 AM   #4
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new electric water heater - Vacuum breaker necessary?


Thats only for sprinkler systems, you don't need that for the water heater
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Old 01-15-2007, 10:10 AM   #5
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new electric water heater - Vacuum breaker necessary?


Thanks! There was one on the old line to the water heater but I hadn't seen one before that. After seeing it, I asked around, heard some yeses and some nos. I defer all to your knowledge. Thanks Ron.
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Old 05-24-2012, 06:13 PM   #6
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new electric water heater - Vacuum breaker necessary?


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Originally Posted by J187 View Post
Hey Ron, I think maybe different names are the problem. Anti-siphon device? Backflow preventer?

http://en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

I just say vacuum breaker because the device I happened to have is a vacuum breaker, w. the little hood on top.

If you do say yes, the other question is, do I have to install it upright or can I install it upside down or verticle??

Thanks again!
Mandatory in Massachusetts

Must be installed upright (so it looks like a Mushroom)

Watts N36

Water Service Vacuum Relief Valves

http://www.watts.com/pages/_products...ls.asp?pid=815
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Old 05-24-2012, 07:19 PM   #7
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new electric water heater - Vacuum breaker necessary?


The purpose of a vacuum breaker at a water heater is, in the event extreme suction should be applied to the water system, for example a fire engine pumper fighting a fire down the street, the water heater tank doesn't collapse or implode.
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Old 05-24-2012, 07:54 PM   #8
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new electric water heater - Vacuum breaker necessary?


Gravedigging.
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Old 05-24-2012, 09:09 PM   #9
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new electric water heater - Vacuum breaker necessary?


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The purpose of a vacuum breaker at a water heater is, in the event extreme suction should be applied to the water system, for example a fire engine pumper fighting a fire down the street, the water heater tank doesn't collapse or implode.
Good Point.

They're only about $15. Of course you may need extra fittings which will likely double the cost. I think it's worth the expense. Especially since I believe you can use the same Vacuum Breaker over and over again.

Last edited by SalemCat; 05-24-2012 at 09:13 PM.
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Old 05-24-2012, 09:29 PM   #10
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new electric water heater - Vacuum breaker necessary?


Who dug up this 5 yr old post?
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Old 05-25-2012, 06:43 PM   #11
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Who dug up this 5 yr old post?
Someone using Google to get plumbing do it yourself help.
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Old 05-26-2012, 08:40 AM   #12
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new electric water heater - Vacuum breaker necessary?


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Originally Posted by SalemCat View Post
Mandatory in Massachusetts

Must be installed upright (so it looks like a Mushroom)

Watts N36

Water Service Vacuum Relief Valves

http://www.watts.com/pages/_products...ls.asp?pid=815

Wow never heard that one; I would imagine it would then be required for the whole house. You have to install a vacuum breakers on bottom fed water heaters. But then again every code varies.
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Old 05-26-2012, 08:42 AM   #13
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new electric water heater - Vacuum breaker necessary?


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Who dug up this 5 yr old post?

Dam it just waist-ed 10 min typing.

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