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-   -   new electric water heater - Vacuum breaker necessary? (http://www.diychatroom.com/f7/new-electric-water-heater-vacuum-breaker-necessary-5911/)

J187 01-14-2007 11:15 AM

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.

Ron The Plumber 01-14-2007 12:50 PM

Vacuum breaker?

I don't know what you mean by this.

J187 01-15-2007 08:15 AM

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!

Ron The Plumber 01-15-2007 08:18 AM

Thats only for sprinkler systems, you don't need that for the water heater

J187 01-15-2007 10:10 AM

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.

SalemCat 05-24-2012 06:13 PM

Mandatory in Massachusetts - Must be installed Upright
 
Quote:

Originally Posted by J187 (Post 29981)
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

AllanJ 05-24-2012 07:19 PM

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.

Alan 05-24-2012 07:54 PM

Gravedigging. :censored:

SalemCat 05-24-2012 09:09 PM

Quote:

Originally Posted by AllanJ (Post 928075)
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.

TheEplumber 05-24-2012 09:29 PM

Who dug up this 5 yr old post? :laughing:

AllanJ 05-25-2012 06:43 PM

Quote:

Originally Posted by TheEplumber (Post 928234)
Who dug up this 5 yr old post? :laughing:

Someone using Google to get plumbing do it yourself help.

Javiles 05-26-2012 08:40 AM

Quote:

Originally Posted by SalemCat (Post 928015)
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.:yes:

Javiles 05-26-2012 08:42 AM

Quote:

Originally Posted by TheEplumber (Post 928234)
Who dug up this 5 yr old post? :laughing:


Dam it just waist-ed 10 min typing. :censored:


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